Red Velvet Thumbprint Cookies - Pizzazzerie

Ingredients

• 1 cup unsalted butter (room temperature)
• 1 cup granulated sugar
• 1/2 cup sour cream
• 1 large egg
• 4 teaspoons red food coloring ((I used gel food color))
• 2 1/2 cups all-purpose flour
• 1/2 teaspoon baking powder
• 3 tablespoons unsweetened baking cocoa powder
• 1/4 teaspoon salt
• 1/2 cup unsalted butter (room temperature)
• 2 cups powdered sugar
• 1 teaspoon vanilla extract
• 1 tablespoon heavy cream ((or milk))