Apple Crisp - Forks 'n' Flip Flops

Ingredients

• 1/3 cup unsalted butter, (slightly melted)
• 1/2 cup old fashioned oats
• 1/2 cup brown sugar
• 1/2 tsp baking powder
• 1/2 tsp ground cinnamon
• dash of salt
• 1/2 cup flour
• 3 large Granny Smith apples, (peeled and sliced thin)
• 3 tbs unsalted butter, (melted)
• 2 tbs flour
• 1/2 lemon squeezed
• 3 tbs milk
• 1/2 tsp vanilla extract
• 1/4 cup brown sugar