Quick Birthday Cake Blondies – Easy 30-Min Recipe
These quick birthday cake blondies are soft, chewy, and studded with rainbow sprinkles for a nostalgic birthday cake flavor. Made in under 30 minutes with simple pantry ingredients, they’re the perfect weeknight dessert or last-minute treat.
- Prep Time: 10 minutes
- Cook Time: 20 minutes
- Total Time: 30 minutes
- Yield: 9 servings 1x
- Category: Dessert
- Cuisine: American
Ingredients
- ½ cup (1 stick) unsalted butter, melted
- 1 cup (200g) light brown sugar, packed
- ¼ cup (50g) granulated sugar
- 1 large egg, at room temperature
- 2 teaspoons vanilla extract
- 1 cup (120g) all-purpose flour
- ½ teaspoon baking powder
- ¼ teaspoon salt
- ½ cup rainbow sprinkles (jimmies), plus more for topping
Instructions
- Preheat your oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper, leaving some overhang on two opposite sides.
- Melt the butter in a microwave-safe bowl in 30-second bursts. Let cool for 2 minutes.
- In a medium mixing bowl, whisk together the melted butter, brown sugar, and granulated sugar until smooth and well combined.
- Add the egg and vanilla extract. Whisk vigorously for about 30 seconds until smooth, glossy, and slightly thickened.
- Add the flour, baking powder, and salt. Fold gently with a rubber spatula or wooden spoon until just combined. Do not overmix.
- Gently fold in ½ cup of rainbow sprinkles using as few strokes as possible.
- Scrape the batter into the prepared pan and spread evenly. Sprinkle an extra tablespoon of sprinkles on top.
- Bake for 18-22 minutes, until edges are golden brown and pulling away from the sides. The center should look slightly underbaked and puffy. A toothpick inserted in the center should come out with a few moist crumbs.
- Cool completely in the pan on a cooling rack for at least 20 minutes. Use the parchment handles to lift the blondies out, then transfer to a cutting board.
- Slice into 9 or 16 squares and serve.
Notes
Use rainbow jimmies (rod-shaped sprinkles) not nonpareils to prevent color bleeding. Let butter cool before adding egg to avoid scrambling. Check for doneness at 18 minutes; center should look slightly underbaked. Cool completely before cutting for clean slices. Store in an airtight container at room temperature for up to 4 days. Freeze individual squares wrapped in plastic wrap for up to 3 months.
Nutrition
- Serving Size: 1 blondie (based on
- Calories: 290
- Sugar: 32
- Sodium: 120
- Fat: 12
- Saturated Fat: 7
- Carbohydrates: 44
- Protein: 3
Keywords: birthday cake blondies, quick blondies, sprinkle blondies, easy dessert, 30-minute recipe, funfetti blondies