Preheat the oven to 350° and spray a 9x13 baking dish with nonstick cooking spray. In a large bowl, combine 3 cups of flour, 1 cup sugar, 4 tsp baking powder, 2 eggs, 2 tsp vanilla extract and 1 1/2 cup milk and mix well with a hand mixer.

Turn the mixer on to low and slowly add in the 1/2 cup of butter (melted) mix until combined. Spread the batter into the prepared baking dish.

in a medium/small bowl, combine 3/4 cup butter (softened), 1 cup brown sugar, 2 tbsp flour and 1 tbsp cinnamon. Stir until well mixed.

Drop the cinnamon mixture by spoonfuls into the batter. Take a butter knife and make swirls all around the cake. Dragging the knife through the cake batter and the cinnamon mixture.

Bake for 35-40 minutes. Or until you put a knife in the middle and it comes out clean.

for the glaze, whisk together in a small bowl 2 cups powdered sugar, 5 tbsp milk, 1 tsp vanilla extract. See the tips and tricks if it’s not really thick.

Pour the glaze over the warm cake. Slice and serve. Enjoy!