Red Velvet Chocolate Sandwich Cookies

Ingredients

• 1 1/2 cups gluten-free all-purpose flour
• 1/4 cup cocoa powder
• 1 teaspoon baking soda
• 1/2 teaspoon coarse salt
• 1/2 cup unsalted butter or vegan baking stick, at room temperature
• 1 1/4 cups packed dark brown sugar
• 1/4 cup plant milk (soy, almond, oat, etc.)
• 1/4 tablespoon white vinegar
• 2 heaping tablespoons cornstarch mixed with 3 tablespoons water
• 1 tablespoon unsulfured molasses
• 1 teaspoon pure vanilla extract
• 1 tablespoon red food coloring
• 3/4 cups chocolate chips
• 5 gluten-free chocolate sandwich cookies, broken into pieces
• 1/2 cup chocolate chips
• 9 gluten-free chocolate sandwich cookies, broken into pieces