Maple-Cinnamon Oat Pop Tarts

INGREDIENTS

2 cups

unbleached all-purpose flour

1 cup

oat flour (See recipes notes below)

1/2 tsp

salt

6 tbsp

unsalted butter , cut into small cubes and chilled

3 tbsp

coconut oil or shortening, chilled (measure out each tablespoon separately and chill along with the butter)

2 tbsp

maple syrup

to 8 tbsp. ice water

egg

1/2 cup

maple sugar or brown sugar

1 1/2 tsp

cinnamon

1/3 cup

powdered sugar

to 3 tbsp. maple syrup