Ingredients FOR THE CINNAMON CRUMB TOPPING •  1 cup all-purpose flour •  1/2 cup dark brown sugar •  1/4 teaspoon salt •  1/2 teaspoon ground cinnamon •  1/2 cup (1 stick) cold unsalted butter, cut into small cubes FOR THE COFFEE CAKE •  1/2 cup unsalted butter •  1 cup sugar •  3 large eggs •  1/4 cup creme fresh or sour cream •…