Easy Protein Flan Recipe (Whey Custard)

This high-protein flan uses whey protein isolate to increase protein content while maintaining a classic custard texture. The result is a smooth, creamy whey custard that delivers extra protein without sacrificing the richness expected from a traditional flan.

Unlike standard flan recipes, protein custards require a more controlled approach to mixing and baking. Whey protein can firm quickly when overheated or overmixed, so this recipe relies on gentle blending and low-temperature baking to keep the texture silky rather than grainy.

If you enjoy classic custards but want a dessert that fits into a higher-protein lifestyle, this protein flan offers a balanced option that can be made ahead, unmolded cleanly, and served chilled with its caramel sauce intact.

Why You’ll Love This Recipe

• Smooth, creamy custard with clean slices
• Higher protein than traditional flan
• Uses simple, familiar ingredients
• Make-ahead friendly and easy to portion
• Balanced sweetness without a heavy mouthfeel

Expert Tips for Perfect Protein Flan

• Use whey protein isolate, not concentrate, for a smoother texture.
• Blend the eggs briefly to avoid incorporating excess air, which can cause bubbles.
• Bake at a low temperature to prevent curdling or graininess.
• A slight jiggle in the center is normal and firms up during chilling.
• Chill fully before unmolding for clean edges and proper structure.

Ingredients for Protein Flan (Whey Custard)

For the Caramel

• 200 g granulated sugar
• 2 tablespoons water

For the Custard

• Pinch of fine salt
• 4 large eggs, at room temperature
• 360 ml evaporated milk
• 395 g sweetened condensed milk
• 1 scoop vanilla whey protein isolate

How to Make Protein Flan (Whey Custard)

Step 1: Prepare the oven and water bath. Preheat the oven to 150 C. Bring a kettle or pot of water to a simmer and keep it hot for the water bath.

Step 2: Make the caramel. Add the sugar and water to a saucepan over medium heat. Cook without stirring until the sugar dissolves and turns a light amber color, about 8 to 10 minutes.

Step 3: Coat the ramekins. Carefully pour a thin layer of caramel into the bottom of each ramekin or flan mold. Set aside to harden.

Step 4: Blend the custard base. Add the evaporated milk, condensed milk, whey protein, and salt to a blender. Blend until smooth and fully combined.

Step 5: Add the eggs. Add the eggs and blend briefly, about 15 to 20 seconds, just until incorporated. Avoid overblending to prevent excess air.

Step 6: Fill the molds. Pour the custard mixture into the prepared ramekins, stopping just below the rim.

Step 7: Bake in a water bath. Place the ramekins in a deep baking dish. Pour hot water into the dish until it reaches halfway up the sides of the ramekins. Transfer to the oven and bake for about 55 to 65 minutes, until the edges are set and the centers still jiggle slightly.

Step 8: Cool and chill. Remove the ramekins from the water bath and let them cool on a rack for 30 minutes. Refrigerate for at least 2 hours until fully set.

Step 9: Unmold and serve. Run a knife around the edges, invert onto plates, and gently lift off the molds before serving.

Storage & Make-Ahead Tips

• Not recommended for freezing, as custard texture can break after thawing.
• Store flan covered in the refrigerator for up to 3 days.
• Keep flan in molds until ready to serve for best texture.

Frequently Asked Questions About Protein Flan

More Flan Recipes You’ll Love

• Easy Caramel Flan Recipe Without Condensed Milk
• Portuguese Vanilla Flan Recipe (Pudim de Baunilha)
• Filipino Leche Flan Recipe
• Easy Mexican Caramel Flan Recipe
• Yummy Easy Ecuadorian Flan Recipe
• Brazilian Flan (Pudim de Leite Condensado)
• Orange Flan (Citrus Caramel Custard)
• Coconut Flan Recipe (Flan de Coco)
• Espresso Flan with Caramel Sauce
• Pumpkin Flan (Flan de Calabaza With Caramel Sauce)

Protein Flan (Whey Custard)

Marcela Arias

A smooth, creamy protein flan made with whey protein isolate and baked gently for a classic custard texture. This high-protein dessert delivers balanced sweetness, clean slices, and a silky finish without sacrificing traditional flan flavor.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 1 hour hr

Chill Time 2 hours hrs

Total Time 3 hours hrs 15 minutes mins

Course Dessert, Healthy, Protein Desserts

Cuisine American

Servings 6 Ramekins

Calories 240 kcal

Equipment

• Medium saucepan
• Heatproof spatula or spoon
• Blender
• Ramekins or flan molds
• Deep baking dish (for water bath)
• Kettle or saucepan (hot water)
• Cooling rack

Ingredients

  

For the Caramel

• 200 g granulated sugar
• 2 tablespoons water

For the Whey Custard

• 4 large eggs room temperature
• 360 ml evaporated milk
• 395 g sweetened condensed milk
• 1 scoop vanilla or unflavored whey protein isolate
• Pinch of fine salt

Instructions

 

• Preheat the oven to 150 C and bring a kettle or pot of water to a gentle simmer for the water bath.
• Add the sugar and water to a saucepan over medium heat and cook without stirring until the sugar melts and turns a light amber color.
• Carefully pour a thin layer of caramel into the bottom of each ramekin and set aside to harden.
• Add the evaporated milk, condensed milk, whey protein isolate, and salt to a blender and blend until smooth.
• Add the eggs and blend briefly, about 15 to 20 seconds, just until combined.
• Pour the custard mixture into the prepared ramekins, stopping just below the rim.
• Place the ramekins in a deep baking dish and pour hot water into the dish until it reaches halfway up the sides of the molds.
• Bake for about 60 minutes, until the edges are set and the centers jiggle slightly.
• Remove from the water bath and cool on a rack for 30 minutes, then refrigerate for at least 2 hours.
• Run a knife around the edges, invert onto plates, and serve chilled.

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