Ingredients: 5 Tbsp butter 1 cup packed light brown sugar 1 tsp vanilla 1 egg 1 cup all-purpose flour 1 tsp baking powder ½ tsp salt
Preheat oven to 350 degrees. Melt butter and put in a large bowl. Stir in brown sugar, vanilla, and egg until the mixture looks smooth and glossy. Blend in the flour, baking powder, and salt until well combined. Scrape batter into greased baking pan. Bake for 25 minutes in an 8-inch pan or 20 minutes in a 9-inch pan. Cut into squares and serve.