Preheat an oven to 180c (350f) and brush a mini muffin pan with softened butter.
In a large mixing bowl, add the butter and the dark chocolate. Melt completely in the microwave or on a bain Marie. Let the chocolate mixture cool completely.
Add the cocoa powder, granulated sugar, eggs, kosher salt, and vanilla extract, and mix with a whisk until well combined.
Add the flour and mix until just combined and there are no lumps of flour visible. Don't overmix!
Scoop about 2-3 tablespoon of the mixture into the mini muffin pan and bake in a 180c (350f) preheated oven for 12-15 minutes.
Do not overbake these! After you remove them from the oven, while they cool, they continue to bake.
Let them cool in the pan for about 20 minutes, then carefully, remove them from the pan to a cooling rack to cool completely.
Notes
Use room temperature ingredients. It is important that you use room-temperature ingredients like eggs. This step ensures that your mixture mixes into a homogenous mixture and bakes perfectly. you don’t want to place cold batter into the oven.
Don’t overmix the batter, you don’t want to develop the gluten in the flour. This step ensures you have moist brownies and not dense and dry brownies.
Measure your flour correctly! When measuring your flour, avoid scooping it with a measuring cup. Instead, stir the flour with a spoon to create as many air pockets as possible, and spoon it into your measuring cup. Finally, level it with a back of a knife.
Add some of your favorite add-ins! Make this recipe your own and add your favorite brownie add-ins: chocolate chips, chopped walnuts, chopped pecans, chocolate chunks, M&M, caramel sauce, white chocolate, kinder, toffee, and more! Be creative!
Be patient! I know it’s extremely tempting to eat these brownies as they are pulled out of the oven, but let these brownies cool for at least 10 minutes so they will be more firm and won’t crumble up. These brownies are extra moist and melt-in-your-mouth delicious, so it will be worth it to wait these 10 minutes.
Don’t overbake your brownies! to have super moist brownies, we like to underbake the brownies a little bit.