S'mores Cupcakes (Gluten Free)

INGREDIENTS

1 cup

gluten free graham cracker crumbs ((rich tea biscuits work too))

1/2 stick

unsalted butter, melted

7 oz

dark chocolate, chopped

1 1/3 sticks

unsalted butter

1/8 cup

cocoa powder

3/4 cup

granulated sugar

medium eggs, room temperature

1/2 cup

+ 1/2 tbsp (65 g) plain gluten free flour blend ((I've used Doves farm plain gluten free flour blend, which doesn't contain xanthan gum))

1/3 cup

almond flour

1 1/2 tsp

baking powder

1/2 tsp

xanthan gum

salt

3/8 cup

boiling hot water

medium egg whites

1 3/4 cups

granulated sugar

1/2 tsp

cream of tartar