Place 8 oz of butter in a double boiler over medium heat until fully melted.
Mix in 1 cup of peanut butter until well combined.
Stir in 2 tsp of vanilla extract.
Gradually whisk in 2 cups of powdered sugar until smooth.
Spread the mixture evenly in a greased 9x13 dish.
Place 8 oz of butter in a clean double boiler over medium heat until fully melted.
Whisk in 1 cup of cocoa powder, stirring constantly to avoid burning.
Stir in 2 tsp of vanilla extract and 1/2 cup of goat milk until well combined.
Gradually whisk in 4 cups of powdered sugar until smooth.
Pour the chocolate mixture over the peanut butter layer in the dish.
Use a chopstick to create swirl designs by gently mixing the two layers.
Place the dish in the refrigerator and chill for 4-6 hours until set.
Once set, cut into squares and enjoy.
