1 1/2 cups all-purpose flour
1/2 cup sugar
2 tsp baking powder
1/4 tsp salt
3/4 cup milk
1 egg
1 tsp vanilla extract
1/4 cup melted butter
For the Cinnamon Swirl:
1/2 cup butter (softened)
1/2 cup brown sugar
1 tbsp cinnamon
For the Glaze:
1 cup powdered sugar
2 tbsp milk
1/2 tsp vanilla extract
Set oven temperature to 350°F (175°C) and coat the baking dish with oil. Combine flour, sugar, baking powder, and salt in a bowl.
Stir until smooth after adding the melted butter, milk, egg, and vanilla.
Transfer the mixture to the ready-made dish. Swirl the batter with a knife after mixing the ingredients for the cinnamon swirl and dropping spoonfuls over it.
Remove the toothpick after 25 to 30 minutes of baking. Combine glaze ingredients in a bowl and pour over the heated cake.