Crumbl's Buckeye Brownie Cookies: Made at Home - Olive and Co.

Ingredients

• 1 1/2 cup softened butter
• 1 1/2 cup brown sugar
• 1/2 cup granulated sugar
• 3 large eggs
• 2 tablespoons corn syrup
• 1 tablespoon vanilla extract
• 3 3/4 cups flour
• 1 cup cocoa powder
• 1 tablespoon cornstarch
• 2 teaspoons baking soda
• 1 teaspoon salt
• 1 1/2 cup semi-sweet chocolate chips
• 1/3 cup softened butter
• 1 1/2 cup peanut butter
• 1 1/2 tablespoon milk/cream
• 1 1/2 teaspoon vanilla extract
• 1/8 teaspoon salt
• 3 cups powdered sugar
• 1 cup semi-sweet chocolate chips
• 1/2 cup heavy cream