FOR THE CRUMB FILLING– 3/4 cup all-purpose flour– 1/2 cup brown sugar– 4 tbsp unsalted butter– 1/4 tsp maple extractFOR THE ICING– 1 cup powdered sugar– 1 tbsp milk– 1 tbsp unsalted butter– 1/8 tsp maple extract
FOR THE DOUGH– 4 cups all-purpose flour– 1/3 cup granulated sugar– 2 packets active dry yeast– 3/4 tsp salt– 1/2 cup water– 1/2 cup buttermilk– 4 tbsp unsalted butter– 2 large eggs– 1 large egg white, beaten– 1 tbsp water