Upside-down Chocolate Pudding Cake

This cake inspired the younger half of the family so much that they even composed an anthem in its honor, titled “Upside-down chocolate pudding cake for breakfast”:
Upside-down chocolate pudding cake for breakfast,
Upside-down chocolate pudding cake for lunch,
Upside-down chocolate pudding cake for dinner,
Upside-down chocolate pudding cake for brunch!
Upside-down chocolate pudding cake
It tastes so good, it really does!
Upside-down chocolate pudding cake
For breakfast, lunch, dinner, and brunch,
It tastes so good, oh yes, it really does!

Consider increasing the cocoa in this recipe.

Ingredients:

½ cup all-purpose flour
¼ cup granulated sugar
1 Tbsp unsweetened cocoa powder
¾ tsp baking powder
¼ tsp salt
¼ cup milk
2 Tbsp butter
1 tsp vanilla
½ cup granulated sugar
2 Tbsp unsweetened cocoa powder
¾ cup boiling water

Turn on oven to 350°. Put flour, the ¼ cup sugar, the 1 Tbsp cocoa powder, baking powder, and salt into a mixing bowl; stir until well mixed.

Add milk, butter, and vanilla. Stir until smooth. Pour batter into ungreased 1-qt casserole dish.

Put ½ cup sugar and 2 Tbsp cocoa powder in a small mixing bowl; gradually stir in boiling water. Pour evenly over batter in casserole dish.

Put casserole dish in oven. Bake ~30 minutes (until toothpick comes clean). Cool 20-30 minutes before serving.