3 c all-purpose flour, sifted
¼ tsp salt
1 c granulated sugar
4 tsp baking powder
1 and ½ c milk
2 large eggs
2 tsp vanilla extract
½ c (1 stick) unsalted butter, melted

for the cinnamon filling:

1 c (2 sticks) unsalted butter, softened to room temperature
1 c packed light brown sugar
2 Tbsp all-purpose flour
1 Tbsp ground cinnamon

for the glaze:

2 c powdered sugar, sifted
5 Tbsp milk
1 teaspoon vanilla extract