Preheat the oven to 350ºF (177ºC). Line an 8" or 9" square baking pan with foil and spray with nonstick spray. Set aside.
In a medium saucepan over medium heat, melt the butter and chopped chocolate, stirring frequently until completely smooth. Allow to cool for about 15 minutes.
½ cup (113g) unsalted butter, 8 ounces (227g) semi-sweet chocolate
Whisk sugar into cooled chocolate mixture until combined. Add the eggs one at a time, whisking after each addition until smooth. Whisk in the vanilla and almond extracts. Add the flour, salt, and sprinkles and stir gently until completely combined.
¾ cup (150g) firmly packed brown sugar, ¼ cup (50g) granulated sugar, 3 large eggs, 1 teaspoon vanilla extract, ½ teaspoon almond extract, ¾ cup (90g) all-purpose flour, ¼ teaspoon salt, ½ cup (100g) sprinkles
Pour the batter into the prepared pan. Bake brownies for 25-30 minutes or until a toothpick inserted in the center comes out mostly clean. Allow brownies to cool completely before covering in ganache.
CHOCOLATE GANACHE
Pour the chocolate chips into a small bowl. Set aside.
1 cup (175g) semi-sweet chocolate chips
In a small saucepan over medium heat, heat the heavy cream while whisking occasionally until steaming. Remove from heat and pour over the chocolate chips. Whisk the chocolate and the cream together until it it smooth. Allow to cool at least 20 minutes before using.
⅔ cup (160mL) heavy cream
Pour the ganache evenly over the brownies. It will probably spread out evenly on its own, but you can use a spatula or spoon to gently guide the ganache into the corners of the pan. Add sprinkles on top of the ganache, if desired.
sprinkles
Place pan of brownies in the refrigerator to allow ganache to set completely, at least 2 hours.
When you are ready to cut the brownies, remove the brownies by lifting the foil overhang straight up. Peel back remaining foil and place brownie block onto a large cutting board. Store leftover brownies in the refrigerator, up to 1 week. Brownies freeze well, up to 3 months. Thaw in refrigerator overnight.
Notes
Room temperature eggs: these incorporate into batter much more easily than cold eggs, although this is not absolutely necessary.
All nutritional values are approximate and provided to the reader as a courtesy. Changing ingredients and/or quantities will alter the estimated nutritional calculations.