Swapping avocado for banana gives this creamy keto smoothie its thick, rich texture without all the sugar — 5.3g net carbs and 12g protein. Raspberries keep it bright, and it's in my blender almost every morning.
I started making this keto raspberry smoothie back in 2018 when I realized I could swap avocado for banana and still get that thick, creamy texture I wanted. The first batch was honestly too thick (I used a whole avocado), but after testing different ratios, 60 grams of avocado hit the sweet spot for a smoothie that's rich but still drinkable.
The trick nobody talks about is avocado ripeness. I've made this with firm avocados and slightly overripe ones, and the difference is real. A slightly overripe avocado blends into this velvety base that you'd never guess was avocado. Firm ones leave tiny chunks no matter how long you blend. So if your avocado has a little give when you press it, that's the one you want.
Raspberries are my go-to berry for this because they're one of the lowest-carb options and they cut through the richness of the avocado. I've tried this with strawberries, blackberries, and even a mixed berry blend. Raspberries still win for me, but a strawberry-raspberry combo comes in close second. If you want something in a completely different direction, my cucumber smoothie is what I reach for when I want something lighter and more refreshing.
What makes this a real breakfast for me (not just a snack) is the collagen and trace minerals I add. A scoop of collagen brings the protein up, and the trace minerals are something I've been adding to my morning drinks for years. Most people skip them, but I notice a difference in how I feel by mid-morning. If you're looking for more keto drinks to rotate through, I keep a list of favorites, from my keto vanilla milkshake for something indulgent to keto cold brew when I need caffeine instead.
The coconut oil is optional but I always include it. It adds another layer of fat that keeps me full until lunch and helps the smoothie feel more substantial. You won't taste it at all once everything is blended. This whole thing comes together in under two minutes, which is why it's become my default low carb breakfast on busy mornings. I've made hundreds of these at this point, and the recipe has barely changed because it just works.
The Best Nut Milk For Keto Smoothies
I’ve tested this smoothie with just about every nut milk out there, and macadamia nut milk is my first choice every time. It has the highest fat content and lowest carb count of any nut milk I’ve found, which matters when you’re keeping things keto. The flavor is subtle and slightly sweet, so it doesn’t compete with the raspberries.
If you can’t find macadamia nut milk (it’s not in every grocery store), here’s what I’d reach for instead. Almond milk is the easiest swap and works well, just make sure it’s unsweetened. Coconut milk from a carton (not the canned stuff) gives you extra richness. I also use cashew milk sometimes, and it blends the smoothest of all of them. Heavy cream mixed with water is another option if you want it extra rich. I use macadamia nut milk in most of my recipes, including my keto hot chocolate, for the same reason.
Low Carb Sweeteners That Work Here
I reach for Swerve almost every time I make this. It dissolves completely in cold liquid, which is the main thing that matters in a smoothie. Plain erythritol can leave a cooling aftertaste, and granular stevia doesn’t always blend out. Swerve just disappears.
If you don’t have Swerve, monk fruit sweetener is my second pick for this low carb recipe. It dissolves well and has a clean taste. Liquid stevia drops also work if you go easy on them (2-3 drops is plenty for me). Whatever you use, start with less than you think you need and taste before adding more. The raspberries bring natural sweetness, so I sometimes skip the sweetener entirely when my berries are really ripe.
Supplements I Add To My Morning Smoothie
This is where my smoothie turns into an actual meal. I add collagen powder and trace minerals to every single batch, and I’ve been doing this for years. The collagen bumps the protein up without changing the flavor at all, and the trace minerals are something most people overlook. I notice a difference in my energy levels when I skip them.
On days when I want more of a post-workout shake, I’ll toss in a scoop of vanilla protein powder too. It thickens things up, so I add an extra splash of water to compensate. Adaptogens like ashwagandha or lion’s mane go in occasionally, but honestly the collagen and minerals are my non-negotiables. If you’re into adding things to your morning drinks, I do the same thing with my keto dalgona matcha latte.
Berry Variations That Actually Work
I’ve run this recipe with every low carb berry I could find. Raspberries are still my top pick because they’re tart enough to balance the richness of the avocado. But here’s what else works if you want to switch it up.
Strawberries make it sweeter and a little thicker. I use about 4-5 medium ones.
Blackberries give it a deeper, more earthy flavor. Seeds are more noticeable though.
Blueberries are the mildest option. Good if you want the avocado flavor to come through more.
Spinach turns it green but you genuinely cannot taste it. I add a small handful when I want extra nutrients.
Cocoa powder with the raspberries is my favorite combo when I want something that tastes like a keto dessert. A tablespoon does it.
My personal favorite variation is half raspberries, half strawberries. That combo tastes like a berry milkshake. If you’re in more of a fruity mood, my keto lemonade and keto strawberry shortcake kebabs scratch a similar itch.
How To Prep This Smoothie Ahead Of Time
This is the system I’ve been using for over a year, and it cuts my morning smoothie time down to about 45 seconds. I portion avocado and raspberries together into Ziploc bags and freeze them flat. Each bag gets 60 grams of avocado and half a cup of raspberries, which is exactly one smoothie.
On smoothie morning, I grab a bag, dump it frozen into the blender with the liquids and supplements, and blend. The frozen fruit replaces most of the ice, so I only add a few cubes instead of a full cup. The texture actually comes out slightly thicker and creamier this way, which I prefer.
I usually prep 5-7 bags on Sunday and they last all week in the freezer. The avocado doesn’t brown when it’s frozen with the berries, which I found out by accident. Something about the raspberry acid keeps it green. If you like prepping drinks ahead, the same batch-prep mindset works for my creamy keto hot chocolate mix too.
How To Make The Creamiest Keto Smoothie
I've tested this enough times to know what actually matters for the texture. Use a slightly overripe avocado, not a firm one. Firm avocados leave tiny bits no matter how long you blend. Add the ice last, on top of everything else, so the blades hit the softer ingredients first. I blend for about 30-40 seconds in my Vitamix, but if you're using a regular blender, go for a full 60 seconds and scrape down the sides halfway through. The coconut oil needs to be liquid when it goes in (I microwave mine for 10 seconds), otherwise it clumps up in the cold liquid instead of blending smooth.
Blend until all ingredients are combined and smooth.
3
Enjoy
Pour into your favorite smoothie cup and add a straw.
Nutrition
Per serving: 1 smoothie
Calories
312
Fat
26g
Protein
12g
Total carbs
13.8g
Net carbs
5.3g
Nutrition is an estimate calculated from the ingredients listed. Brands vary, so check labels if you track closely.
Frequently Asked Questions
Can I use frozen raspberries instead of fresh?
I actually prefer frozen raspberries in this smoothie. They make the texture thicker and creamier without needing as much ice. I buy the big bags of frozen raspberries from Costco and they work perfectly. Just make sure they're unsweetened, no added sugar. When I use fresh raspberries, I add more ice to get the same thickness.
Can I freeze avocado ahead of time for smoothies?
I do this every single week. I cut avocados into 60-gram portions, bag them with the raspberries, and freeze them flat. They keep for at least two weeks in my freezer with no browning. The key is getting the air out of the bag before sealing. I've tried freezing avocado alone and it works fine, but pairing it with the berries in one bag saves me a step in the morning.
What if I don't have a high-speed blender?
I used a regular Ninja blender for the first two years I made this, and it still turned out good. The main difference is blending time. In my Vitamix, this takes 30-40 seconds. In a regular blender, I go for a full 60 seconds and stop to scrape down the sides halfway through. If your avocado is slightly overripe (soft when you press it), a regular blender handles it much better than a firm one.
Can I substitute nut butter for avocado?
I've tested this with almond butter and macadamia nut butter as avocado replacements. Two tablespoons of either one gives you a similar richness, but the texture is noticeably thinner. It's more of a traditional smoothie consistency rather than that thick, creamy base you get from avocado. My preference is still avocado, but nut butter works in a pinch when I don't have a ripe one on hand.
Does this smoothie work as a post-workout shake?
I use it as a post-workout shake at least twice a week. I add an extra scoop of vanilla protein powder on those days, which brings the total protein up significantly with the collagen already in there. The extra protein thickens it up, so I add a splash more water to keep it blendable. My recovery feels better when I have this versus just a protein shake, probably because of the healthy fats from the avocado and coconut oil.
How do I pick the right avocado for the creamiest smoothie?
I've learned this the hard way after hundreds of batches. You want a slightly overripe avocado, the kind that gives easily when you press it. A firm avocado leaves tiny bits in the smoothie no matter how long you blend, and the texture feels slightly grainy. If my avocados are too firm, I leave them on the counter for an extra day. Slightly overripe blends into this completely smooth, velvety base that you'd never guess was avocado.
What can I substitute for macadamia nut milk?
I've made this with every nut milk in my fridge. Almond milk is the easiest swap and the one I grab most often when I'm out of macadamia. Coconut milk from a carton (not canned) makes it richer. Cashew milk blends the smoothest. Any unsweetened nut milk works, but I keep coming back to macadamia because of the higher fat and lower carb count. It makes a noticeable difference in how creamy the final smoothie feels.
How long can I store leftover smoothie?
I've kept leftovers in a mason jar in the fridge for up to 24 hours. It separates overnight (that's normal), so I just shake it hard or re-blend for a few seconds. The color gets a little darker from the avocado oxidizing, but the flavor stays the same. Honestly though, I rarely have leftovers because this recipe makes one perfect serving for me.
I’m two weeks into drinking this most mornings and the coconut oil kept seizing into little flecks on all that ice. So now I blend everything else first and drizzle the oil in through the lid while it’s running. Comes out smooth every time. I cut the sweetener to about a spoonful too, the raspberries carry it fine on their own. You were right that the oil belongs in there, it just has to go in last for me.
Serving this at a cookout felt like a gamble, avocado skeptics everywhere. Raspberry hits first, and by the time people were asking what made it so thick, they’d already decided they liked it.
I’ve been making raspberry-banana smoothies every summer since college, it was just part of July for me. Going keto I assumed that whole category was finished. Made this one last Tuesday when it was a hundred degrees out and sat on the porch with it, kept expecting it to taste like a compromise, and it didn’t. The avocado does exactly what banana used to do, that thick cold weight that actually fills you up. I haven’t thought about that old apartment kitchen in years but I did while drinking this. The collagen might be doing something smart in there too, but what got me is that it just tastes like a summer thing, not a substitute.
The coconut oil is what other keto smoothies leave out and it’s such an obvious fix once you taste it. Everything else I’ve made goes watery and thin by 10am, but this one holds the texture all the way through. Avocado plus coconut oil is just a different category, honestly. Rotation locked for the rest of summer.
I’ve tried so many keto smoothies and most of them either taste like straight protein powder or turn into this weird watery mess. This one is different. The avocado thing sounds bizarre (I almost skipped that part) but it creates this thick, creamy texture that no amount of almond milk or ice ever managed on its own. Made it four times this week because it’s been SO hot and I had zero interest in turning on the stove. The raspberries keep it from feeling heavy, which I was a little worried about with the coconut oil in the mix. Way better than anything else I’ve been putting in my blender for the past year.
Four in a week means you get it. The avocado thing sounds wrong on paper but it’s the only thing that actually replaces that thick banana texture without the sugar. Nothing else comes close.
Freeze your avocado chunks ahead of time and you can skip the ice completely (same thick texture, more raspberry flavor coming through since you’re not diluting it).
This is genuinely good but I’d bump the sweetener by at least another tablespoon (I used Swerve), the raspberries add a tartness that fights the avocado base if you go light on it. Once I adjusted that it became my actual morning routine.
Avocado in a smoothie sounded wrong to me (I’ve had some grainy disasters) but I had half that needed using and figured it was worth a shot. The texture is so much creamier than the heavy cream and frozen berry thing I’ve been doing, and the raspberries keep it from tasting like guacamole. Three mornings in a row now. I don’t think I’m going back to the old way.
My daughter grabbed it before I even poured my own glass. Not keto, just wanted the pink smoothie. I’d add a bit more Swerve next time, but she’s already put in a request for tomorrow.
