Hot Fudge Sundae Cake

Ingredients

• 2 tsp vanilla extract
• 1 cup packed light brown sugar
• 1 cup all-purpose flour
• 1/2 cup cocoa powder
• 3/4 cup granulated sugar
• 2 tsp baking powder
• 1/2 cup semi-sweet chocolate chips
• 1/2 cup whole milk
• 1 3/4 cup hot water
• 2 tbsp melted butter