Texas Sheet Cake (aka Secret Cake)

INGREDIENTS

2 cups

gluten-free all-purpose flour mix (I used 1 ¾ cups of my Two-Ingredient Gluten-Free Flour Mix and ¼ cup sweet rice flour)

2 cups

granulated sugar

1/2 cup

butter (or vegan butter or margarine)

1 cup

water

3 1/2 tbsp

cocoa powder (or raw cacao powder)

1/2 cup

buttermilk (or homemade “buttermilk”; see notes)

1 tsp

vanilla extract

unbeaten eggs

1 tsp

baking soda

1/2 tsp

salt (I use sea salt)

1/2 cup

butter (or vegan butter or margarine)

3 1/2 tsp

cocoa powder (or raw cacao powder)

1/3 cup

buttermilk (or homemade “buttermilk”; see notes)

3 cups

powdered sugar

1 tsp

vanilla extract

1/2 cup

chopped nuts of choice (optional)