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Protein Boston Cream Donuts

These high protein Boston cream donuts are soft, cake-style donuts filled with creamy vanilla custard and topped with rich chocolate, delivering 19 grams of protein per donut while staying lower calorie and perfect for a high-protein, low-carb lifestyle.
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Prep Time 15 minutes
Cook Time 15 minutes
Servings: 4 donuts
Course: Dessert
Cuisine: American
Calories: 157
Ingredients Method Notes

Ingredients
  

Donuts
  • 50 g oat flour
  • 1½ tsp baking powder
  • 15 g natural sweetener
  • 1½ tsp cinnamon
  • ⅓ tsp salt
  • 1½ tsp vanilla extract
  • 120 g vanilla yogurt
  • 1 egg
Custard Filling
  • 40 g vanilla custard powder
  • 100 ml water
Chocolate Topping
  • 30 g chocolate protein powder
  • 5 g cocoa powder
  • 120 ml skim milk

Method
 

  1. Preheat your oven to 180°C and lightly grease a donut pan.
  2. In a bowl, whisk together oat flour, baking powder, sweetener, cinnamon, and salt until evenly combined.
  3. Add vanilla extract, yogurt, and egg. Mix until you have a smooth, thick but scoopable batter.
  4. Spoon or pipe the batter into the donut pan, filling each cavity about three-quarters full.
  5. Bake for 12 to 15 minutes, until the donuts are just firm to the touch and lightly golden. Do not overbake.
  6. Let the donuts cool completely before filling. This is important or the custard will melt.
  7. For the custard, whisk custard powder with water a little at a time until thick and smooth. Chill briefly if needed.
  8. Carefully slice each donut or use a piping tip to inject the custard into the center.
  9. For the topping, whisk protein powder, cocoa powder, and milk until smooth and pourable.
  10. Spoon or dip the tops of the donuts into the chocolate topping. Let set before serving.

Notes

Do not overbake. Cool fully before filling. Adjust liquid gradually.
Nutrition (per donut):
 
Calories: 157
Carbs: 12g
Fiber: ~3g
Protein: 19g
Fat: 3g
Net Carbs: ~9g