Nutella Lava Cupcakes (Print Version)

# Ingredients:

01 - 1/2 cup (114g) unsalted butter, softened.
02 - 1½ cups (298g) light brown sugar, packed.
03 - 2 eggs, room temperature.
04 - 1½ teaspoons vanilla extract.
05 - 1/2 cup (40g) Dutch-process cocoa powder.
06 - 1½ teaspoons baking soda.
07 - 1/4 teaspoon salt.
08 - 1½ cups (180g) cake flour.
09 - 2/3 cup (150g) sour cream.
10 - 3/4 cup hot water or coffee.
11 - 3/4 cup (170g) unsalted butter, softened.
12 - 6 tablespoons (85g) cream cheese, softened.
13 - 1¼ cups (340g) Nutella.
14 - 1/2 cup (85g) semisweet chocolate chips.
15 - 1/2 cup (85g) milk chocolate chips.
16 - 3/4 cup (227g) Nutella.
17 - 1/4 cup whole milk.

# Instructions:

01 - Preheat oven to 350°F, prepare cupcake pans.
02 - Beat butter and brown sugar until light.
03 - Add eggs one at a time, then vanilla.
04 - Mix in cocoa powder, baking soda, salt.
05 - Alternate adding flour and sour cream.
06 - Add hot water, mix until smooth.
07 - Fill cupcake liners 2/3 full.
08 - Bake 16-17 minutes.
09 - Cool completely.
10 - Mix Nutella and milk until smooth.
11 - Core cooled cupcakes, fill with Nutella mixture, replace top of cake core.
12 - Melt chocolates.
13 - Beat butter and cream cheese, add Nutella and melted chocolate.
14 - Frost filled cupcakes.

# Notes:

01 - Makes 20-22 cupcakes.
02 - For best results, weigh ingredients.
03 - Can use cake mix for shortcut.
04 - Dutch cocoa preferred but regular works.
05 - Coffee enhances chocolate flavor but is optional.