Christmas Grinch Cookies (Soft Green Crinkle Cookies) - My Home Made Recipe

Ingredients

• 1 box (15.25 oz or 432 g) vanilla or white cake mix
• 1/2 cup (113 g) unsalted butter, softened
• 1 tablespoon vegetable oil
• 2 large eggs
• 1 teaspoon vanilla extract
• Green gel food coloring, as needed
• 1/2 cup (60 g) powdered sugar
• 1 tablespoon cornstarch
• 24 red heart sprinkles or small red candies