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Chocolate banana kefir smoothie

A cold chocolate and banana smoothie made with kefir, which gives it a gentle tang under the cocoa. About 375 ml, mild and smooth enough to sip through a morning when appetite is low.

By The foodose editorial team. Nutrition calculated from USDA FoodData Central. Checked on paper on 16 October 2026; not yet cooked in a test kitchen or photographed, so the times and yield are estimates. How we develop our recipes
What still needs a real kitchen
  • Confirm the cocoa disperses fully in 15 seconds on low
  • Confirm the yield is about 375 ml
  • Photograph the finished smoothie
Time
About 5 min
estimated
Serves
1
see below
Energy
280 kcal
per serving
Protein
28 g
per serving
Jump to recipe
Not yet photographed. The panel names the dish’s main ingredients rather than showing a picture we have not taken.

Ingredients for 1 serving

1 serving

Check off ingredients as you go.

Contains milk. Check the labels on packaged ingredients:

  • whey protein powder. Protein powders differ by brand in protein per scoop, sweeteners and allergens; check the label.

Cooking steps

  1. Pour the kefir into the blender jug and add the protein powder and cocoa powder.

  2. Blend on low for 15 seconds, until the cocoa has disappeared into the kefir and no dark clumps float on top.

  3. Add the frozen banana and blend on high for 30 to 45 seconds, until smooth.

  4. Pour into a glass and drink it cold. The kefir gives it a gentle tang under the cocoa; a riper, more spotted banana softens it.

The useful detail

Cocoa powder repels cold liquid and floats in dry clumps. Blending it into the kefir first, before the banana goes in, breaks every clump while there is still room for the liquid to move.

Make it work for you

One serving is One glass, about 375 ml. You can switch to a smaller portion in the ingredients above; it is three quarters of this, and it contains correspondingly less energy and protein. It is an option, not a goal.

  • Semi-skimmed milk instead of kefir

    Sweeter, with no tang, and slightly thinner.

    Per serving: about 20 kcal more, about 1 g less protein, about 2 g more fat.

  • Plain skyr instead of protein powder

    Thicker and sharper, with less protein. Use 180 ml of kefir so the glass stays the same size; the figures here keep the full 250 ml.

    Per serving: about 20 kcal more, about the same protein, about the same fat.

  • Peeled, unfrozen banana

    Same flavour, but the smoothie is warmer and thinner. Chill the kefir well. Nutrition is not affected.

Estimated nutrition

Per standard serving, calculated from the ingredients above. Nutrition changes with substitutions, brands and how much oil stays in the pan.

The protein powder and kefir share the protein; the cocoa adds flavour and some fibre without added sugar. The sweetness is the banana's.

Nutrition per serving
Energy280 kcal
Protein28 g
Fat4 g
of which saturates2 g
Carbohydrate39 g
of which sugars24 g
Fibre5 g
Sodium140 mg
Show calculation notes

Each ingredient’s weight is multiplied by its USDA FoodData Central values per 100 g. The whole recipe is added up and divided by 1. Raw weights are used for meat, fish and vegetables; beans and lentils are drained weights. All of the oil is counted as eaten. Added salt is not included; sodium from stock, bread, cheese and tinned food is.

Calculation, whole recipe
IngredientWeight usedSourceEnergyProtein
kefir255 gFDC 170904Kefir, lowfat, plain, LIFEWAYCalculated with FoodData Central's plain low-fat kefir record, a branded product; plain kefirs are close to it.110 kcal9.7 g
whey protein powder20 gFDC 173180Beverages, Protein powder whey based70 kcal15.6 g
cocoa powder5.5 gFDC 169593Cocoa, dry powder, unsweetened12 kcal1.1 g
bananas100 gFDC 173944Bananas, raw89 kcal1.1 g
Whole recipeDivided by 1282 kcal27.5 g

Per serving the energy is rounded to the nearest 5 kcal, grams to the nearest whole gram and sodium to the nearest 10 mg. Calculation method 1.0, September 2026. How the calculation works.

Storage and reheating

In the fridge
Best drunk straight away. If you keep it, cover it and refrigerate within 2 hours, and drink it within 24 hours; it separates, so shake or stir it first.
Reheating
Not for reheating. Serve cold.

Checked against US Food and Drug Administration, Refrigerator and Freezer Storage Chart, USDA Food Safety and Inspection Service, Leftovers and Food Safety, FoodSafety.gov, Safe Minimum Internal Temperatures and FoodSafety.gov, Cold Food Storage Chart. UK guidance from the Food Standards Agency is shorter, at two days for most leftovers.

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