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I’ll say this upfront: no smoothie burns fat while you sit there drinking it. What this smoothie actually does is keep you full, cut down on mindless snacking, and make it easier to stick with your goals — which, over weeks and months, is what actually transforms the bod.

I crafted this fat-burning smoothie around a few ingredient combos that show real research support for fullness and blood sugar, then made sure it actually tastes good enough that I’d drink it often. That’s the whole strategy. If your goal this season is to slim down, start here — this recipe is one of our top-rated weight loss smoothies.

Fat-burning smoothie in a mason jar on table with cut up celery, kale and grapefruit.

Ingredients in Fat-Burning Smoothie

  • Kale: the fiber and bulk in this smoothie — barely tastes like anything once it’s blended with the fruit.
  • Cucumber + celery: mostly water, so they stretch the smoothie into a bigger, more filling glass without adding many calories.
  • Chia seeds: they swell up and thicken the smoothie, plus add a bit of staying power between the fiber and plant-based fat.
  • Grapefruit: brings natural sweetness and the fullness benefit noted above. Removing the inner membrane before blending cuts most of the bitterness.
  • Green tea: swapped in for plain water as the liquid base, so you get a little natural caffeine along with the antioxidants.
  • Pineapple: balances out the grapefruit’s tartness and makes the whole thing taste more like a treat than a health food.
  • Protein powder: added at the end so it blends without turning gritty — this is what turns the smoothie into something that holds you until lunch instead of an hour.
A bowl of ready-to-eat creamy vegetable soup next to silver spoons.
Jen Hansard blending weight loss smoothies in her kitchen on concrete countertop.

How to Make Fat-Burning Smoothie

Of all the recipes I’ve created, this is the one I come back to: greens, fiber, and superfoods that curb my cravings and keep me energized until lunch. Five minutes, one blender — here’s how:

  1. Fill your blender with kale, cucumber, celery, chia seeds, grapefruit and chilled green tea.
  2. Puree until smooth.
  3. Add frozen pineapple. Remove the grapefruit’s inner membrane to cut bitterness — or swap in orange + lemon.
  4. Blend on high speed until combined (about 30 seconds).
  5. Add one serving protein powder and blend on low speed just to mix.
  6. Pour into a glass and serve chilled.

For more drinks like this, see my roundup of the best weight loss drinks.

More Ingredient Combos

  • Cacao + almonds: cacao’s flavanols are an active research area (including work published in BMJ) — and more importantly, chocolate that’s actually good for you makes a routine you’ll keep.
  • Oats + blueberries: oats are the fiber workhorse of this whole list. The blueberry belly-fat study you may have seen was done in rats — promising, not proof — but berries + oats is a fullness combo I’d bet on regardless.
Glass of fat-burning smoothie surrounded by fruits and vegetables.
4.55 (261)

Fat-Burning Smoothie

Jen Hansard
My fat-burning smoothie blends grapefruit, chilled green tea and chia, ingredients people reach for to support their goals, with kale, cucumber and pineapple. With 32 grams of protein and 12 grams of fiber, it keeps you full.
Serves: 1
Prep Time: 3 minutes
Blend Time: 2 minutes
Total Time: 5 minutes

Video

Ingredients 

  • 1 cup kale
  • 1 cucumber chopped
  • 1 tablespoon chia seeds
  • ½ grapefruit peeled and seeded
  • 1 stalk celery chopped
  • ½ cup green tea chilled
  • 1 cup pineapple frozen
  • 1 serving whey protein isolate

Instructions 

  • Pour the green tea into a blender. Add the kale, cucumber, chia seeds, grapefruit and celery and blend on high until smooth.
  • Add the frozen pineapple and blend on high again until smooth.
  • Add the protein powder and blend on low just to combine. Pour into a glass and serve immediately.
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Recipe Notes

  • Grapefruit Swap: Grapefruit can interact with some prescription medications. If that’s a concern, use 1 orange or 2 clementines instead.
  • Prep Tip: Remove the peel, pith and inner membranes from the grapefruit to cut the bitterness. If it’s still too bitter for you, start with less and add more to taste.
  • Vegan Swap: Use homemade protein powder or another plant-based powder in place of the whey.
  • Make Ahead: Chop the kale, cucumber and celery and freeze them together in a bag. Blend straight from frozen with the tea, grapefruit, chia and pineapple.

Nutrition

Serving: 16 oz | Calories: 344 kcal | Carbohydrates: 49 g | Protein: 32 g | Fat: 5 g | Saturated Fat: 1 g | Polyunsaturated Fat: 3 g | Monounsaturated Fat: 0.4 g | Trans Fat: 0.02 g | Sodium: 213 mg | Potassium: 1067 mg | Fiber: 12 g | Sugar: 30 g | Vitamin A: 4068 IU | Vitamin C: 149 mg | Calcium: 317 mg | Iron: 3 mg

Common Questions

Can I make this ahead of time?

It’s best fresh, but you can store it in an airtight container in the fridge for a few hours. Give it a good shake before drinking since the chia seeds will settle.

Can I skip the protein powder?

Yes, though it won’t hold you as long. If you skip it, consider adding a spoonful of nut butter or extra chia seeds for staying power instead.

What can I use instead of grapefruit?

Orange and lemon together give you a similar tart-sweet balance without the bitterness, if grapefruit isn’t your thing.

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About the Author

Jen Hansard

I’m the mom who swapped Lucky Charms for green smoothies— and never looked back. Here you’ll find smoothie recipes and plant-based recipes made simple and tasty.

4.55 from 261 votes (70 ratings without comment)

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Comments

    1. You can leave the celery out but doing so will change the effects of the smoothie a little bit. You can leave it out or sub cucumber.

    1. 5 stars
      Does the celery matter if it’s not put in?
      As a celebrity I don’t really like celery.

    2. Hey Ty, you can leave the celery out but that will change the effects of the smoothie a little bit. If cucumber is a celebrity-approved vegetable, you could try using that instead. 😉

    3. Hey Bucky. It will certainly change the flavor and, to an extent, the benefits of the smoothie. But if you can’t eat or don’t care for grapefruit, you can sub a large orange.

  1. I would love to try this smoothie but i am allergic to avocado, can you suggest a substitute for it?

  2. I am not a fan of tea, ( I don’t drink tea at all). Are you able to exclude tea?

    1. Green tea provides steady energy and boosts the metabolism so if you leave it out, just know the results from drinking this smoothie will be a little different, but you can def sub filtered water or coconut water.

    1. Peter, this question is best discussed with your health care provider and/or nutritionist. They can help you with your dietary needs best. 🙂