German Chocolate Upside-Down Cake

Ingredients

• 1/2 cup packed brown sugar
• 1/4 cup butter, cubed
• 2/3 cup pecan halves
• 2/3 cup sweetened shredded coconut
• 1/4 cup evaporated milk
• CAKE:
• 1/3 cup butter, softened
• 1 cup sugar
• 4 ounces German sweet chocolate, melted
• 2 large eggs, room temperature
• 1 teaspoon vanilla extract
• 1-1/2 cups all-purpose flour
• 1/2 teaspoon baking soda
• 1/2 teaspoon baking powder
• 1/2 teaspoon salt
• 3/4 cup buttermilk
• Whipped topping, optional