Chocolate Cake with Chocolate Buttercream Frosting

Ingredients:

1 1/2 cups (300g) granulated sugar

1/2 cup (110g) packed light-brown sugar

3/4 cup (70g) unsweetened cocoa powder (scoop and level to measure)

1 tsp baking soda

3/4 tsp salt

1 cup (235ml) boiling water*

3/4 cup (175ml) vegetable oil or canola oil

1/4 cup (56g) unsalted butter, melted

2 large eggs

3 large egg yolks

1 Tbsp vanilla extract

2 cups (256g) all-purpose flour (spoon and level to measure)

1/2 cup (116g) sour cream

1/3 cup (80ml) milk

Instructions:

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