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    Home » Desserts

    Birthday Brownies From Brownie Mix

    Published: Oct 30, 2022 by Nora Rey · This post may contain affiliate links · Leave a Comment

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    The perfect brownies for celebrating, topped with whipped chocolate ganache and rainbow sprinkles. Making these Birthday Brownies from Brownie Mix is so easy you can prepare them in no time.

    Slices of Birthday Brownies From Brownie Mix on parchment paper

    Upgrade your boxed brownies in 7 other ways:

    • Cheesecake Brownies from Brownie Mix
    • Brookie Bars from Brownie Mix
    • Oreo Brownies from Brownie Mix
    • Peanut Butter Brownies from Brownie Mix
    • Nutty Brownies from Brownie Mix
    • S'mores Brownies from Brownie Mix
    • Salted Caramel Pretzel Brownies from Brownie Mix
    Jump to:
    • Ingredients you'll need
    • Tips for best brownies
    • How to make this recipe
    • Frequently asked questions
    • More about brownies
    • Other dessert recipes you may like
    • 📖 Recipe

    Ingredients you'll need

    For the brownie base

    Individual ingredients for the brownie base

    For the chocolate ganache

    Individual ingredients for chocolate ganache with sprinkles

    Notes and substitutions

    • Brownie Mix: Use a regular-size (about 18 ounces) boxed brownie.
    • Water: Replace with milk, buttermilk, or brewed coffee to add richness and flavor.
    • Instant coffee: An optional ingredient that enhances the chocolate flavor and tames the sweetness of the brownies.

    Tips for best brownies

    • Bring eggs to room temperature and lightly beat them to incorporate them well without overmixing.
    • Grease and line the pan with parchment paper to prevent the brownies from sticking.
    • To avoid overbaking, check the brownies with a toothpick 2 minutes before they are done. Look for several separate crumbs for fudgy brownies and less for cakey brownies.
    • Cool the brownies before slicing. Refrigerating them improves their texture.

    How to make this recipe

    (1)Make the brownie batter as directed in the package and spread it on an 8x8-inch pan. (2)Bake it, then let it cool.

    Unbaked brownie batter in a pan. Baked brownie on a parchment paper.

    (3)Pour ¾ cup of hot cream over 4 ounces of chocolate in a bowl. Let the chocolate melt for about 2 minutes. (4)Stir until smooth. Refrigerate to slightly cool the mixture, about 30 minutes.

    Adding cream to the chocolate in the bowl. Mixing chocolate ganache in a bowl with a spatula.

    (5)Using a hand mixer, whip on medium-high speed until fluffy and lighter in color for about 3 minutes. (6)Spread the whipped ganache evenly on the cooled brownie. Decorate with rainbow sprinkles.

    Whipping chocolate ganache in a bowl with a hand mixer. Adding sprinkles to the frosted brownies.

    Let the birthday brownies set for at least an hour in the fridge before cutting. Refrigerate leftovers and consume them within 5 to 7 days.

    Slices of birthday brownies on parchment paper

    Frequently asked questions

    Why do eggs need to be at room temperature for baking?

    Eggs at room temperature blend easily with other ingredients. Baked goods will rise evenly and have a uniform texture.

    What is the best oil for baking?

    Use a neutral-flavored oil for baking, such as canola or other vegetable oils. I also like mild-tasting oils like avocado oil, olive oil, and coconut oil.

    What happens if you overwhip ganache?

    Overwhipping ganache makes it grainy. When you start with a cooled ganache, it only takes one to 3 minutes to become fluffy and lighter in color. If it has turned grainy, reheat it in a double boiler and start over.

    More about brownies

    If you'd like to know more, here are frequently asked questions on box brownies, including extra tips, troubleshooting, and more.

    Other dessert recipes you may like

    • red velvet cupcakes
      Red Velvet Cupcakes
    • sliced loaf of banana bread
      Classic Banana Bread
    • Salted caramel pretzel brownies on a parchment paper.
      Salted Caramel Pretzel Brownies From Brownie Mix
    • Brookie bars on a parchment paper
      Brookie Bars from Brownie Mix
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    Let's connect on Facebook, Instagram, Pinterest, TikTok, Twitter, and Youtube. Be sure to tag me when you try any of my recipes @recipesbynora!

    📖 Recipe

    birthday brownies on a parchment paper

    Birthday Brownies From Brownie Mix

    The perfect brownies for celebrating with whipped chocolate ganache frosting and rainbow sprinkles, ready in no time!
    5 from 1 vote
    Print Pin Rate
    Course: Dessert
    Cuisine: American
    Prep Time: 45 minutes
    Bake Time: 25 minutes
    Total Time: 1 hour 10 minutes
    Servings: 16
    Calories: 100kcal
    Author: Nora Rey
    Cost: $5-$6

    Equipment

    • 8x8-inch pan
    • Hand mixer

    Ingredients

    For the brownie base (see package)

    • brownie mix about 18 ounces
    • eggs room temp & lightly beaten
    • water sub:milk, buttermilk, or coffee
    • oil (canola, olive, or other vegetable oils)
    • ½ teaspoon instant coffee or ¼ teaspoon espresso powder optional

    For the frosting

    • ¾ cup heavy cream hot
    • 4 ounces dark chocolate (bittersweet or semisweet) chips or finely chopped
    • 2 tablespoons rainbow sprinkles
    US Customary - Metric

    Instructions

    • Make the brownie batter as directed in the package and spread it on an 8x8-inch pan.
    • Bake it, then let it cool.
    • Pour the hot cream over the chocolate in a bowl. Let the chocolate melt for about 2 minutes.
    • Stir until smooth. Refrigerate to slightly cool the mixture for about 30 minutes.
    • Using a hand mixer, whip on medium-high speed until fluffy and lighter in color for about 3 minutes.
    • Spread the whipped ganache evenly on the cooled brownie. Decorate with rainbow sprinkles.
    • Let it set for at least an hour in the fridge before cutting.

    Video

    Notes

    Tips for best brownies:
    • Bring eggs to room temperature and lightly beat them to incorporate them well without overmixing.
    • Grease and line the pan with parchment paper to prevent the brownies from sticking.
    • To avoid overbaking, check the brownies with a toothpick 2 minutes before they are done. Look for several separate crumbs for fudgy brownies and less for cakey brownies.
    • Cool the brownies before slicing. Refrigerating them improves their texture.

    Nutrition

    Calories: 100kcalCarbohydrates: 4gProtein: 1gFat: 9gSaturated Fat: 4gPolyunsaturated Fat: 1gMonounsaturated Fat: 4gTrans Fat: 1gCholesterol: 37mgSodium: 13mgPotassium: 17mgSugar: 3gVitamin A: 194IUVitamin C: 1mgCalcium: 10mgIron: 1mg
    Tried this Recipe? Pin it for Later!Mention @recipesbynora or tag #RecipesByNora!

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