Apple Crisp

INGREDIENTS

1/2 cup

all-purpose flour

1/2 cup

old fashioned oats

1/2 cup

packed light-brown sugar

1/2 tsp

baking powder

1/4 tsp

ground cinnamon

1/4 tsp

salt

1/3 cup

unsalted butter (, diced into small cubes)

lbs Granny Smith apples (at room temperature) (peeled, cored and sliced thin (about 1/8-inch))

3 tbsp

unsalted butter (, melted)

2 tbsp

all-purpose flour

3 tbsp

water

1 tbsp

lemon juice

1/2 tsp

vanilla extract

1/4 cup

light-brown sugar

1/2 tsp

ground cinnamon

1 pinch

salt