I could eat 100 of these homemade brownie bites! With just a handful of pantry staple ingredients, they're ridiculously chewy, chocolatey, simple to make, and the whole recipe comes together in 30 minutes. All you need is a mini cupcake pan. It's truly the easiest party dessert ever!
Preheat the oven to 350°F (177°C). Grease the cups of a mini muffin pan with a generous amount of baking spray. Set aside.
Add the butter and bittersweet chocolate to a large microwave-safe mixing bowl. Melt the butter and chocolate together in 30-second increments, stirring in-between rounds, until it's melted, smooth, and very warm.
While the chocolate-butter mixture is still hot, add the sugar. Using a hand mixer, beat the sugar into the butter-chocolate mixture until the sugar is mostly dissolved, about 2-3 minutes. Then, add the cocoa powder and stir until the batter is smooth.
Then, add the eggs one at a time followed by the vanilla extract. Turn the mixer to high and beat the chocolate mixture until it's slightly lightened in color and texture, about 3-4 minutes.
Fold the flour, instant espresso powder, and salt into the chocolate mixture just until the batter is fully combined.
Using a #60 cookie scoop, divide the batter between the mini muffin cups, until they're about 3/4 full. Bake for 10-12 minutes, until an inserted toothpick has just a few moist crumbs.
Let the brownies cool in the mini muffin pan until they're cooled and completely set, about 15-30 minutes. Use a small butter knife to gently release the brownies from the muffin cups. Sprinkle with flaky salt and enjoy!
Notes
For chewy brownies, I definitely recommend weighing the ingredients with a kitchen scale instead of measuring cups! But if you don't have a scale, make sure you use the fluff-scoop-and-level flour method. Fluff the flour with a whisk, scoop the fluffed flour into a measuring cup, and level it off.Be careful not to overheat the butter-chocolate mixture or the chocolate will seize and have a grainy texture. You want it to be very warm but not crazy hot.It can be hard to tell when brownies are done, so use this little pastry school trick! Insert a toothpick in-between the center and the edges of the bites. If there's a few moist crumbs, they're ready to go. If the batter is still wet, keep baking.If you don't have 2 mini muffin pans, you may need to bake the brownies in batches. Just make sure to wipe the brownie crumbs out of the pan before adding more batter!