To prepare this awesome yogurt coffee cake with brown sugar cinnamon topping recipe, first you need to prepare the yogurt cake batter. In a medium mixing bowl, mix together the flour, baking powder, sugar, cinnamon, and salt. Add the wet ingredients to the dry ingredients and mix until well combined. Pour the batter into the greased and floured cake pan. Bake the cake for 35 to 40 minutes, or until the toothpick inserted in the center comes out clean. Let cool for 10 minutes before serving.