Gluten-Free American Mud Cake with Triple Chocolate Frosting

INGREDIENTS

8 oz

unsalted butter, each halved-1 cup

7 oz

(198 grams)72% cacao or more dark chocolate, chopped or broken coarsely

14 oz

granulated sugar-2 cups

3 oz

Dutch processed cocoa powder- 3/4 cup (I recommend Cacao Barry Extra Brute or Pernigotti)

3/4 cup

strong hot coffee or hot water plus 1 tablespoon espresso powder

1 tbsp

gluten-free vanilla extract

large eggs

4 1/2 oz

cornstarch or potato starch-1 cup

4 1/4 oz

rice powder-¾ cup

1 tsp

baking powder

1 1/2 tsp

baking soda (sodium bicarbonate)

1/2 tsp

salt

1/2 tsp

xanthan gum

16 oz

unsalted butter softened-2 cups

2 oz

Dutch processed cocoa powder (such as Pernigotti or Cacao Barry Extra Brute)-2/3 cup

5 oz

semisweet or dark chocolate, melted and cooled to near room temperature

7 oz

marshmallow crème*, 1 small jar

1 tbsp

gluten-free vanilla extract

3 oz

semisweet chocolate, grated or very finely chopped