Celebrate your birthday in style with a guilt-free Single Serve Protein Birthday Cake! Funfetti Mug Cake is low sugar, low fat and has 52g protein!

Forget the oversized cakes and calorie-laden frosting. Packed with protein and fiber, this decadent treat will satisfy your sweet tooth without sacrificing your fitness goals.

With a simple swap of ingredients, you can enjoy a guilt-free celebration that satisfies your sweet tooth without the added sugar and calories. So, ditch the guilt and sharing, and indulge in this high protein birthday cake mug cake all to yourself!

Ingredients for Single Serve Protein Birthday Cake

This single serve protein birthday cake is made with a few simple and healthy ingredients, and has no flour, butter or oil and no sugar either!

Vanilla Protein Powder for sugar free birthday mug cake. I used Quest Nutrition Vanilla Milkshake whey-casein protein powder for this recipe.
HTLT Supps is another option.
Whole Wheat Pastry Flour or use regular flour
Unsweetened Appledauce
Unsweetened Almond Milk
Baking Powder

If you need to add more sweetness, Stevia Powder or Zero Calorie Sugar Substitute; I use Lakanto, to keep strawberry mug cake sugar free; (code HAYLSKITCHEN for a discount here too)

For the Frosting:

More Vanilla Protein Powder; Quest Nutrition Vanilla again
Almond MIlk
A bit of Red Food Color

Can I use other Protein Powder flavors for this birthday cake in a mug?

Yes, you can substitute different protein powder flavors in this recipe!

If you can find a funfetti-flavored protein powder, use that in place of the vanilla protein powder. This will give you a more authentic funfetti flavor.

I suggest using Quest Nutrition Vanilla or HTLT Supps Vanilla protein powder since they are sweet, but you can experiment with other flavors to your liking.

Try a birthday cake protein powder and you’re going to have a blast with this recipe!

Keep in mind that using a different flavor might slightly alter the taste of the final cake.

Other Alternatives for this Healthy Birthday Cake for One

I recommend making this low calorie, sugar free and healthy birthday cake for one with the powder and ingredients listed since it gives the best results.

If you need options, here’s some!

Whole Wheat Pastry Flour: Regular all purpose flour or gluten free baking flour in the same amount by weight.
Self raising flour also works, but be sure to avoid using baking powder.

Unsweetened Applesauce: Feel free to use mashed banana or pumpkin puree, but this will alter the flavor of the cake a little.
Almond Milk: Any other milk works!

How can I make this Funfetti Mug Cake Recipe Vegan?

To make this single serving funfetti mug cake vegan, you’ll need to make a few simple substitutions:

Whey-Casein Protein Powder: Replace this with a plant-based protein powder. Be sure to choose one that you enjoy the flavor of, as it will significantly impact the overall taste of the cake.
I also recommend adding a bit of vanilla extract and sweetener in this case since plant based protein powders have a different earthy taste.
Almond Milk: You can use any other plant-based milk you prefer, such as soy milk, oat milk, or cashew milk.
Sprinkles: Be sure to use sprinkles that are plant-based.

For the frosting, use the same vegan protein powder and plant-based milk.

How to make Birthday Cake Mug Cake with Protein Powder

This protein powder birthday cake mug cake really is a simple one, and here’s how to put it together:

Here are the instructions for this recipe with some more details:

Preheat oven to 350°F (175°C). Make sure your oven rack is in the center position for even baking.
Lightly grease a 1 cup ramekin. You can use cooking spray or a small amount of oil or butter. Greasing the ramekin will prevent the cake from sticking.
In a mixing bowl, whisk together the vanilla protein powder, whole wheat pastry flour, and baking powder. Make sure there are no lumps in the dry ingredients.
Add the unsweetened applesauce and almond milk to the dry ingredients. Stir until just combined. The batter should be thick and smooth.
Taste the batter and add sweetener if needed. If you prefer a sweeter cake, you can add a small amount of stevia or your preferred zero-calorie sweetener.
Gently fold in the sprinkles. Be careful not to overmix, as this can make the cake tough.
Pour the batter into the greased ramekin. Smooth out the top with a spatula.
Bake for 18-20 minutes, or until the top of the cake is set. You can insert a toothpick into the center of the cake to check for doneness. If it comes out clean or with a few moist crumbs, the cake is done.
Let the cake cool slightly before frosting. This will help the frosting set properly.
To make the frosting, combine the vanilla protein powder, almond milk, and a drop of red food coloring in a small bowl. Stir until the mixture is thick but spreadable. You can add more or less almond milk to achieve the desired consistency.
Spread the frosting over the cooled cake and top with additional sprinkles.
Enjoy your single-serve protein birthday cake!

How to Store Single Serve Funfetti Protein Cake:

It’s very likely you’re going to finish this entire single serving funfetti protein cake in one sitting, but just in case you want to make it ahead and save some for later, here’s how:

Room Temperature: If you plan to eat the single serving birthday cake within a few hours, you can store it at room temperature. Simply cover the ramekin with plastic wrap or aluminum foil to prevent it from drying out.
Refrigerator: For longer storage, refrigerate the protein funfetti mug cake for up to 3 days. Make sure to cover it tightly to prevent it from absorbing other flavors in the fridge.
Freezing: You can also freeze the birthday cake mug cake for up to 2 months. Wrap it tightly in plastic wrap and then aluminum foil before freezing. To thaw, place it in the refrigerator overnight or microwave it on low power until warmed through.

Tips:

If you’ve already frosted the cake, it’s best to store it in the refrigerator to keep the frosting fresh.
When reheating, you can microwave the cake for a few seconds to restore its soft texture.
Consider making a fresh batch of funfetti protein frosting if you’ve stored the cake for a while, as the frosting may become dry or lose its flavor over time.

More Protein Powder Mug Cake Ideas to Try:

More Funfetti themed Protein Powder Recipes to try: