Preheat the oven to 350°F. Spray a mini cupcake pan with baking spray and set aside.
Cut the butter into tablespoons.
1/2 cup salted butter
Place the chocolate chips in a large bowl and add the cut-up butter on top—place in the microwave and microwave for 30 seconds.
6 ounces semi-sweet chocolate chips
Stir, microwave for another 30 seconds, and stir again. Continue to microwave in 15-second intervals, stirring in between, until everything is melted and smooth.
Add the sugar to the chocolate mixture and stir to combine.
1 1/2 cups granulated sugar
Add the eggs one at a time, mixing them in completely before adding the next.
3 large eggs
Stir in the vanilla.
2 teaspoons vanilla extract
Whisk together the flour, cocoa powder, and baking powder in a large bowl.
1 cup all-purpose flour, 1/4 cup unsweetened cocoa powder, 1/2 teaspoon baking powder
Pour the wet mixture into the dry and stir until combined with no dry patches left.
Stir in the chocolate chips.
1/3 cup mini chocolate chips
Add 1 ½ tablespoons of the batter into each mini cupcake section. I like to use a cookie scoop for this.
Sprinkle more chocolate chips on top if desired.
Bake for 14-16 minutes until a toothpick inserted into the center comes out mostly clean; you still want a few moist crumbs.
Allow them to cool in the pan for 10 minutes, and gently lift them out. Serve immediately or allow to cool completely.
Notes
Use a mini cookie scoop to make sure your brownies are all the same size for even baking.
Melt butter and chocolate slowly in the microwave in 15-second bursts to avoid burning.
Don’t overmix the batter after adding the dry ingredients—it keeps the texture fudgy, not tough.
Spray your mini muffin tin well or use mini cupcake liners for easy removal.
Check early! Ovens vary. Start checking at 14 minutes with a toothpick.
Top with extra mini chocolate chips before baking to create a gorgeous, bakery-style large image for your blog or social media.