Combine melted butter with brown sugar and cinnamon in 9x9x2 inch square baking pan. Smooth mixture even over bottom. Arrange apple slices over brown sugar mixture. Combine flour, baking powder, soda and salt. Cream butter and sugar. Add eggs one at a time; beat well after each addition. Add dry ingredients alternately with yogurt. Spread half of batter over apple slices. Sprinkle Streusel Filling over batter in pan. Spread remaining batter over filling. Bake at 350F for 30 to 35 minutes or until cake tests done when wooden pick is inserted near center. Invert onto serving plate. Serve warm.
Makes 6 servings.
Makes about 1/3 cup.
Cajun Country -- New Iberia, Louisiana