Keto Birthday Cake Blondies

These keto birthday cake blondies are one of my favorite treats to make when I want something sweet and fun without all the sugar and carbs.

They taste like a real birthday cake dessert. Buttery, vanilla-packed, and loaded with rainbow sprinkles and white chocolate chips. Honestly, you won’t believe they’re low carb.

The base is made with almond flour and sweetened with monk fruit, so they fit perfectly into a keto lifestyle. Each square comes out soft, chewy, and golden on top.

Whether it’s someone’s birthday or you just feel like celebrating on a random Tuesday, these blondies are the answer. No special occasion needed.

They’re super simple to throw together too. One bowl, a handful of ingredients, and about 20 minutes in the oven. That’s it.

Why You’ll Love This Recipe

Tastes Like Real Birthday Cake – The vanilla and butter extracts create that classic birthday cake flavor you thought you had to give up on keto.

Soft and Chewy Texture – These blondies are dense and buttery with a perfectly chewy center that rivals any traditional bakery treat.

Fun and Festive Look – The rainbow sprinkles against the golden base make these look so cheerful and party-ready.

Recipe Ingredients

• 2 cups Almond Flour
• 1/3 cup Melted Unsalted Butter
• 1/2 cup Granulated Monk Fruit Sweetener
• 2 large Eggs
• 1 tbsp Vanilla Extract
• 1/2 tsp Butter Extract
• 1/2 tsp Baking Powder
• 1/4 tsp Salt
• 3 tbsp Sugar-Free Rainbow Sprinkles
• 1/3 cup Sugar-Free White Chocolate Chips
• 1 tbsp Sugar-Free Rainbow Sprinkles for topping

How To Make

Step 1

Preheat your oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper.

Step 2

In a large bowl, whisk together the melted butter and monk fruit sweetener until combined. Add the eggs, vanilla extract, and butter extract. Whisk vigorously until the mixture is smooth and slightly fluffy.

Step 3

Add the almond flour, baking powder, and salt. Stir with a spatula until fully combined into a thick, smooth batter.

Step 4

Fold in the sugar-free white chocolate chips and 3 tablespoons of sugar-free rainbow sprinkles. Stir gently just until distributed so the sprinkles do not bleed color into the batter.

Step 5

Spread the batter evenly into the prepared pan. Scatter the remaining tablespoon of sprinkles over the top and gently press them in.

Step 6

Bake for 20 to 24 minutes, until the top is lightly golden and a toothpick inserted in the center comes out clean or with very few moist crumbs. Be careful not to overbake.

Step 7

Let the blondies cool completely in the pan before slicing into 16 squares. The colors of the sprinkles will pop beautifully against the golden blondie base.

Tips

Let the Butter Cool Before Mixing

After you melt the butter, let it cool for a few minutes before whisking it with the eggs. If the butter is too hot, it will start cooking the eggs and you’ll get little scrambled bits in your batter instead of a smooth mixture.

It should be warm to the touch but not steaming. This takes about 3-5 minutes on the counter.

Don’t Stir the Sprinkles Too Much

Sugar-free rainbow sprinkles tend to bleed their color faster than regular ones. When you fold them in, do about 3-4 gentle strokes with a spatula and stop. That’s it.

If you keep stirring, the colors will start running into the batter and you’ll end up with a grayish-purple blondie instead of a clean, golden base with bright pops of color.

This is also why you press the topping sprinkles on last, right before baking, so they keep their shape and color.

Use Blanched Almond Flour

There’s a big difference between blanched and unblanched almond flour. Blanched almond flour is made from almonds with the skins removed, so it’s finer and lighter in color.

For these blondies, blanched is what you want. It gives you that golden, cake-like look and a smoother texture. Unblanched almond flour has brown specks from the skins and makes the blondies denser and grainier.

More Recipes

• Keto Funfetti Mug Cake
• Keto Raspberry White Chocolate Blondies
• Keto Browned Butter Cookie Bars
• Low Carb Maple Pecan Blondies
• Keto Sugar Cookies with Vanilla Frosting

Frequently Asked Questions

Can I skip the butter extract?

Yes, you can leave it out if you don’t have it on hand. The vanilla extract will still give these blondies plenty of flavor on its own.

That said, the butter extract really helps create that classic birthday cake taste, so it’s worth picking up if you can. It’s inexpensive and easy to find in most baking aisles.