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    Home > Blog > Protein Desserts > Protein Cake

    Protein Birthday Cake (Keto)

    Updated: Sep 16, 2022 · Published: Jan 11, 2017 · By Andréa Marchese · This post may contain affiliate links · 1 Comment

    Jump to Recipe Print Recipe

    Looking for a delicious high-protein, low-sugar birthday cake? This Protein Birthday Cake is it! It's packed with flavor and protein, easy to make, and naturally gluten free. You can even prepare it as a keto birthday cake! 🥳

    slice of protein birthday cake with three layers of cake and with vanilla protein frosting and naturally colored sprinkles, all on a white plate with more sprinkles on it
    Keto Protein Birthday Cake with Easy Sugar Free Frosting

    This protein cake has the best texture and flavor of any I've ever made. It's made with keto-friendly Proteinfull Baking cake mix, and (full disclosure) I developed the recipe for them. The combination of almond protein, whey protein, and flax protein gives it the amazing cake texture you see here. So soft and moist!

    If you like this recipe, take a look at some other recipes here using Proteinfull Baking cake mix: Banana Walnut Cake with Cream Cheese Frosting, Blueberry Muffins, Glazed Cake Donuts, and Carrot Cake with Cream Cheese Frosting. The mix is so versatile!

    protein birthday layer cake with vanilla frosting, naturally colored sprinkles, brightly colored tall candles that are lit, on a marble cake stand with a wooden base. also in view are a stack of plates with forks on top, a small dish of sprinkles, and a pink glass vase in the background
    Keto Protein Birthday Cake with Easy Sugar Free Frosting
    Jump to:
    • 🎂 Ingredients
    • 👩🏼‍🍳 Instructions
    • 🍎 Substitutions
    • 🎂 Variations
    • 🥄 Equipment
    • 🥶 Storage
    • ⚡️ Meal prep tip
    • 🍰 More recipes using Proteinfull Baking Cake Mix
    • 🥣 Recipe
    • 💬 Comments

    🎂 Ingredients

    For the three-layer cake shown here, I used two bags of Proteinfull Baking cake mix.

    To prepare the mixes, you'll need:

    • eggs
    • oil or unsweetened applesauce
    • water

    I frosted the cake with our Easy Sugar Free Frosting.

    I used these great all-natural sprinkles 🥳 and these beautiful colorful tall candles.

    👩🏼‍🍳 Instructions

    Preheat your oven to 325F (160C). (Use an oven thermometer for best results.)

    Line the bottom of three 8" round pans with parchment paper, and then spray with non-stick cooking spray.

    Combine cake mixes with eggs, oil (or applesauce), and water. Mix just until no lumps remain.

    Pour the batter evenly divided into the three pans.

    Bake for 24-28 minutes, or just until a toothpick inserted comes out clean.

    Cool for about 10 minutes before removing the cakes from the pans. Then cool completely before frosting.

    Layer and frost the cake. (This is a helpful video on how to frost a layer cake.)

    Add sprinkles, slice, and enjoy! 🥳

    🍎 Substitutions

    The oil can be replaced with unsweetened applesauce or Greek yogurt.

    🎂 Variations

    In the photos here, I prepared the cake mix with unsweetened applesauce (instead of oil), used double the frosting recipe, and used natural (sugar-sweetened) sprinkles. Admittedly, it's a lot of frosting.

    To lessen the calories and fat, use only a single recipe of sugar free frosting.

    For a keto birthday cake (4g net carbs per serving), prepare the cake mix using oil and use sugar free natural sprinkles.

    One thing to keep in mind, though, is that naturally colored sprinkles don't make a great funfetti cake. The natural colors bake out when they are in the cake batter, and you'll lose much of the color. Traditional sprinkles are the way to go for a funfetti cake!

    🥄 Equipment

    You'll need an oven, a large mixing bowl, three 8" round pans, and 8" parchment rounds.

    It'll be helpful to have an oven thermometer to be sure your oven is at the correct temperature, and a rubber spatula to get every last bit of batter into the pans.

    For frosting the cake, it would helpful to have piping bags, a large offset spatula, and a cake scraper.

    🥶 Storage

    The cake (frosted or unfrosted) will store well refrigerated or frozen. Bring to room temperature to soften the frosting before eating.

    ⚡️ Meal prep tip

    Refrigerate or freeze individual portions! 🍰

    🍰 More recipes using Proteinfull Baking Cake Mix

    • Vanilla Protein Cake (Easy Healthy Recipe)
    • Baked Donuts (Healthy, Keto, High Protein)
    • Protein Carrot Cake with Sugar Free Cream Cheese Frosting
    • Blueberry Protein Muffins (Flourless)

    🥣 Recipe

    slice of protein birthday cake with three layers of cake and with vanilla protein frosting and naturally colored sprinkles, all on a white plate with more sprinkles on it

    Protein Birthday Cake (Keto)

    Makes one 3-layer 8" cake.
    Print Recipe Pin Recipe Rate Recipe
    Prep Time: 1 hour
    Cook Time: 30 minutes
    Servings: 16 slices
    Calories: 327kcal
    Author: Andréa

    Equipment

    • mixing bowl
    • 8" round pans
    • 8" parchment rounds
    • oven thermometer
    • rubber spatula
    • piping bags
    • large offset spatula
    • cake scraper

    Ingredients

    Cake

    • 2 bags Proteinfull Baking cake mix
    • 6 large eggs
    • 6 tablespoons oil or unsweetened applesauce
    • 1 ⅓ cups water

    Frosting

    • 2 recipes Easy Sugar Free Frosting (Keto Vanilla Buttercream)

    Sprinkles 🥳

    • 2 tablespoons all-natural sprinkles (with sugar) or
    • 2 tablespoons all-natural sugar free sprinkles

    Instructions

    • Preheat your oven to 325F (160C). (Use an oven thermometer for best results.)
    • Line the bottom of three 8" round pans with parchment paper, and then spray with non-stick cooking spray.
    • Combine cake mixes with eggs, oil (or applesauce) and water. Mix just until no lumps remain.
    • Pour the batter evenly divided into the three pans.
    • Bake for 24-28 minutes, or just until a toothpick inserted comes out clean.
    • Cool for about 10 minutes before removing the cakes from the pans. Then cool completely before frosting.
    • Layer and frost the cake. (This is a helpful video on how to frost a layer cake.)
    • Add sprinkles, slice, and enjoy!
    • The cake will store well (frosted or unfrosted) refrigerated or frozen.

    Notes

    The nutrition below (in the Nutrition section) is for how the recipe was prepared in these photos, i.e. with unsweetened applesauce instead of oil, with double the frosting recipe, and with sugar-sweetened natural sprinkles. Admittedly, while it looks great in the photo, that's a lot of frosting.
    If you prepare the cake with applesauce, one recipe of frosting, and sugar-sweetened sprinkles, the nutrition per slice is Calories: 219kcal | Carbohydrates: 36g | Protein: 12g | Fat: 14g | Fiber: 6g | Sugar: 4g | Net Carbohydrates: 6g | Erythritol: 24g
    KETO: If you prepare the cake mix with oil, double the frosting recipe, and with sugar free sprinkles, the nutrition per slice is Calories: 366kcal | Carbohydrates: 48g | Protein: 12g | Fat: 29g | Fiber: 6g | Sugar: 3g | Net Carbohydrates: 4g | Erythritol: 38g
    KETO: If you prepare the cake mix with oil, use one recipe of frosting, and with sugar free sprinkles, the nutrition is Calories: 258kcal | Carbohydrates: 35g | Protein: 12g | Fat: 19g | Fiber: 6g | Sugar: 3g | Net Carbohydrates: 4g | Erythritol: 24g

    Nutrition

    Serving: 1slice | Calories: 327kcal | Carbohydrates: 50g | Protein: 12g | Fat: 24g | Fiber: 6g | Sugar: 4g | Net Carbohydrates: 6g | Erythritol: 37.5g
    Tried this recipe?Mention and tag us! @proteincakery

    More Protein Cake Recipes

    • 33 Protein Cake Recipes
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    • Pumpkin Protein Cake with Cream Cheese Protein Frosting

    Reader Interactions

    Comments

    1. kaci cheeseman

      January 16, 2017 at 10:25 am

      Dear heavens! This is stunning Andréa!! Looks to die for!

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    Hi, I'm Andréa! I love baking, coffee, and leg day. Baking with protein powder has helped me develop healthy habits and overcome disordered eating, and I love sharing the recipes I've created.

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