Giant Frosted Strawberry Pop Tart

Bahan-bahan (9 porsi)

• 1 cup all-purpose flour
• 1 1/2 cup white whole wheat flour
• 2 sticks (1 cup) cold salted butter, cut into 1/2 inch pieces
• 1/2 teaspoon kosher salt
• 1 egg beaten, for brushing
• 1 jar (13-16 ounces) strawberry jam/preserves
• 2 cups powdered sugar
• 1 tablespoon vanilla extract
• 3 -6 tablespoons hot milk
• fun sprinkles