Homemade Frosted Brown Sugar Cinnamon Pop Tarts

INGREDIENTS

and 1/2 cups (315g) all-purpose flour (measured correctly)

and 1/4 teaspoons salt

6 tbsp

unsalted butter, chilled and cubed

3/4 cup

vegetable shortening, chilled2

1/2

cup (120ml) ice water

1/2 cup

packed dark or light brown sugar

2 tsp

ground cinnamon

1 tbsp

all-purpose flour

egg wash: 1 large egg mixed with 2 teaspoons milk

3/4 cup

confectioners' sugar (90g), sifted

1 tbsp

milk, plus more as needed

1/2

teaspoon ground cinnamon

1/4

teaspoon vanilla extract