– 6 Granny Smith apples – 1/4 cup all-purpose flour – 3/4 cup sugar – 1/2 cup light brown sugar packed – 1 ½ tsp cinnamon – 2 tsp lemon juice – 1/4 cup light brown sugar packed – 3/4 cup old fashioned oats – 1/4 cup flour – 1 tsp cinnamon – ½ tsp nutmeg – 4 tbsp cold butter – 1/4 cup sugar – ice cream or whipped topping