Crumbl's Mallow Sandwich ft. Oreo Cookies: Made at Home

Ingredients

• 1 1/2 cup softened butter
• 1 1/2 cup brown sugar
• 3/4 cups granulated sugar
• 2 large eggs
• 1 tablespoon vanilla extract
• 3 cups flour
• 1 cup black cocoa powder
• 2 1/2 cups crushed oreos
• 1 teaspoon baking powder
• 2 teaspoons baking soda
• 1/4 teaspoon salt
• 1/4 cup softened butter
• 1 cup softened cream cheese
• 2 teaspoons vanilla extract
• 4 cups powdered sugar
• 3 tablespoons crushed oreos
• 1 tablespoon milk/cream