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🎂
dessert🥤 Milkshake mode
Protein Birthday Cake Shake
30g protein, sprinkles, cake-batter flavor — gym-bro dessert.
3 min prep · 50 min freeze 4 servings easy
Inspired by the Fairlife + Jello cake-batter shake trend showing up in the assistant logs. Built on high-protein milk and a scoop of birthday-cake whey for a milkshake that actually fits a macro plan.
Verdict for
It slushes!
Your drink hits the sweet spot. Pour and pulse.
✅ SLUSHES
Alcohol
0.0%
target 8–14%
Sugar density
12.4 g/100ml
target 11–13 g/100ml
Volume
1300 ml
44.0 oz
Sugar
161 g
total
Alcohol0.0% / target 8–14%
Sweetness12.4 g/100ml / target 11–13 g/100ml
Ingredients
Scale the batch — amounts update live in your units.
4
servings
- Fairlife / High-Protein Milk530 ml
- Birthday Cake Whey Protein60.0 g
- Sugar-Free Vanilla Pudding Mix (dry)25.0 g
- Vanilla Syrup (2:1)45 ml
- Rainbow Sprinkles10.0 g
- Water665 ml
Batch volume1240 ml
Method
- 1.Whisk milk, protein powder, and pudding mix until lump-free.
- 2.Stir in vanilla syrup and most of the sprinkles (save some for topping).
- 3.Run on Milkshake mode for ~50 min.
- 4.Serve in tall glasses, top with whipped cream and the remaining sprinkles.
Need the gear?
Amazon picksThis recipe is dialed in for the Ninja Slushi family. Pick your machine:

Ninja SLUSHi Max XXL
The big-batch flagship
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Ninja SLUSHi Twist
Dual hopper, two flavors at once
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Ninja SLUSHi Original
The compact countertop classic
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