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    Home » Desserts

    Birthday Brownies From Brownie Mix

    Published: Mar 29, 2022 · Modified: Mar 29, 2022 by Nora Rey · This post may contain affiliate links · Leave a Comment

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    These are the perfect celebration brownies with whipped ganache frosting and rainbow sprinkles. Making these birthday brownies from brownie mix is so easy you can prepare them in no time.

    Slices of boxed brownies with whipped chocolate ganache frosting and rainbow sprinkles.

    You can also upgrade your boxed brownies in seven 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
    • How to serve and store
    • Frequently asked questions
    • More about brownies
    • Watch how I make it here
    • Other dessert recipes you may like
    • 📖 Recipe

    Ingredients you'll need

    For the brownie layer

    Assorted ingredients for the brownie base in individual containers.

    For the chocolate ganache frosting

    Assorted ingredients for chocolate ganache with sprinkles in individual containers.

    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 the eggs to room temperature and lightly beat them to ensure they get incorporated well without overmixing.
    • Grease and line the pan with parchment paper so the brownies will not stick and come out easily.
    • Check the brownies two minutes before they should be done. Test with a toothpick — it should come out with several separate crumbs for fudgy brownies and less for cakey.
    • Cool the brownies before slicing. Refrigerating them improves their texture.

    How to make this recipe

    (1)Make the brownie layer according to package instructions. Spread it evenly on an 8x8-inch pan. (2)Bake, then let it cool.

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

    (3)Heat the heavy cream in the microwave or on the stove until very hot. Pour it over the chocolate in a bowl.

    Let it sit for 2 minutes to melt the chocolate. (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)With a hand mixer, whip on medium-high speed until fluffy and lighter in color, 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.

    How to serve and store

    Let the birthday brownies set for at least an hour in the fridge before cutting. Refrigerate leftovers and eat within five to seven days.

    If wrapped properly, you can freeze them for up to three months. Let them thaw in the fridge or on the counter.

    Slices of birthday brownies from brownie mix on parchment paper.

    Frequently asked questions

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

    Eggs at room temperature blend evenly 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. Cool the ganache first to prevent this.

    You only need to whip it for one to three minutes until it is fluffy and lighter in color. If it has turned grainy, reheat in a double boiler and start over.

    More about brownies

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

    Watch how I make it here

    Other dessert recipes you may like

    • Cheesecake Brownies from Brownie Mix
    • Brookie Bars from Brownie Mix
    • Oreo Brownies From Brownie Mix
    • Peanut Butter Brownies 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

    These are the perfect celebration brownies with whipped ganache frosting and rainbow sprinkles. Making these birthday brownies from brownie mix is so easy you can prepare them 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

    Ingredients

    For the brownie layer (see package instructions)

    • 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 chocolate ganache frosting

    • 4 ounces dark chocolate - bittersweet or semisweet (113 grams) chips or finely chopped
    • ¾ cup heavy cream (177 grams) hot
    • 2 tablespoons rainbow sprinkles (20 grams)

    Instructions

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

    Video

    Notes

    Tips for best brownies:
    • Bring the eggs to room temperature and lightly beat them to ensure they get incorporated well without overmixing.
    • Grease and line the pan with parchment paper so the brownies will not stick and come out easily.
    • Check the brownies two minutes before they should be done. Test with a toothpick — it should come out with several separate crumbs for fudgy brownies and less for cakey.
    • 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!
    « How to Make Taho
    Salted Caramel Pretzel Brownies From Brownie Mix »
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