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–+ servings
Close up of cut cake mix blondie with sprinkles.
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4.77 from 21 votes

Cake Mix Blondies

These deliciously sweet blondies are made with a doctored-up cake mix and loaded with sprinkles. A perfect treat that's fun for a party or a special lunchbox goodie.
Prep Time5 minutes
Cook Time30 minutes
Total Time35 minutes
Course: Cookies & Bars
Cuisine: American
Servings: 9
Author: Rachel Gurk

Ingredients

  • 1 box (15 ounces) yellow cake mix
  • ¼ cup vegetable oil
  • 3 tablespoons whole milk
  • 1 large egg
  • 1 tablespoon pure vanilla extract
  • ¼ cup rainbow sprinkles, plus more to top if desired (see note)

Instructions

  • Preheat oven to 350°F. Grease a 9 x 9-inch baking pan or line it with parchment paper; set aside.
  • Mix together cake mix, vegetable oil, milk, egg, and vanilla extract. The batter should be well mixed but it will be stiff. Fold in sprinkles.
    1 box (15 ounces) yellow cake mix, ¼ cup vegetable oil, 3 tablespoons whole milk, 1 large egg, 1 tablespoon pure vanilla extract, ¼ cup rainbow sprinkles, plus more to top if desired
  • Transfer batter to the prepared baking pan and spread evenly with a rubber scraper. If desired, spread more sprinkles on top of batter.
  • Bake for 25 to 30 minutes, or until a toothpick inserted in the center comes out clean. Don't overbake the blondies. Cool completely before cutting blondies into 9 squares.

Video

Notes

  • Cake mix: For best results, use a 15 ounces box of yellow cake mix. When we tested this recipe, we found that using funfetti or white cake mixes resulted in drier blondies.
  • Smaller pan: If using an 8 x 8 -inch pan, bake blondies 30 to 35 minutes.
  • Variations: Feel free to substitute different sprinkle colors, depending on the occasion. Mini chocolate chips (½ cup) can be substituted or toasted pecans. 
  • Storage: Bars will keep on the counter in a tightly covered container for 3 days, a week in the refrigerator, or 3 months in the freezer.

Nutrition

Serving: 1blondie | Calories: 261kcal | Carbohydrates: 44g | Protein: 3g | Fat: 8g | Saturated Fat: 2g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 2g | Trans Fat: 0.2g | Cholesterol: 21mg | Sodium: 354mg | Potassium: 40mg | Fiber: 1g | Sugar: 25g | Vitamin A: 38IU | Calcium: 109mg | Iron: 1mg

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