These moist chocolate cupcakes are topped with the best chocolate frosting! These are the best birthday cupcakes. You don't need a mixer for the cupcakes, and no need to melt chocolate for the frosting!
Preheat your oven to 350°F/175°C and place 14 cupcake liners in your cupcake pans.
In a large bowl, whisk together the flour, sugar, light brown sugar, cocoa powder, baking powder, baking soda and salt. Set aside.
1 cup + 2 tablespoons all purpose flour, ½ cup granulated sugar, ½ cup light brown sugar, ½ cup natural cocoa powder, ½ teaspoon baking powder, 1 teaspoon baking soda, ½ teaspoon kosher salt
In a large jug, whisk the eggs, oil, sour cream, and vanilla until smooth.
2 large eggs, ⅓ cup vegetable oil, 1 teaspoon vanilla extract, ½ cup sour cream
Pour the wet mixture into the flour, stirring until it is just about smooth - we don't want to over mix the batter! Then pour in the hot water and mix until smooth.
½ cup hot water
Fill the cupcake liners so they're ¾ full and bake for 18-20 minutes. A toothpick inserted should come out clean.
Allow the cupcakes to cool for 15 minutes in the tray, then take them out and place on a cooling rack.
Chocolate Frosting
In a stand mixer fitted with the paddle attachment, or in a large bowl with a hand held mixer, combine the room temperature butter with the confectioners' sugar, salt, vanilla extract and cocoa powder on low speed.
2 sticks unsalted butter, 1 teaspoon vanilla extract, ¼ teaspoon kosher salt, 3 ½ cups confectioners' sugar, ½ cup dutch processed cocoa powder
Increase the speed to medium-high and beat for 2-3 minutes, until light and fluffy.
If the frosting isn't as creamy as you would like, add in the heavy cream and beat on medium speed until spreadable.
3-4 tablespoons heavy cream
Video
Notes
My recipes have been developed and tested in metric grams. I highly recommend using a weighing scale and measuring out your ingredients the metric way. I have provided a conversion to US cups but please note that I haven't tested the recipe with this method. Ingredients: I make sure that all of my ingredients are at room temperature before I start the recipe, so pull out all of the ingredients before you start baking.Salt: If you don't have kosher salt, halve the amount of salt called for in the recipe. 1 teaspoon kosher salt = ½ teaspoon fine salt. Please note, I'm using Diamond Crystal kosher salt and not Morton salt which is too salty! Cocoa Powder: I'm using natural unsweetened cocoa powder (not sure what you have? Check the ingredients. If it says 'acidity regulator' or mentions 'alkali', then it's dutch processed). You can use Dutch-processed or natural for the frosting! Storage: You can store the cupcakes in the fridge for 3-4 days. I recommend letting it come to room temperature before enjoying!