Soft Frosted Sugar Cookies

Name: Soft Frosted Sugar Cookies
Prep time: 15 min
Cook time: 8 min
Total time: 23 min
Cuisine: American
Ingredients: ½ cup unsalted butter (softened (113g)); 1 cup sugar ((200g)); ⅓ cup sour cream ((80g)); 1 large egg + 1 egg yolk; 1 teaspoon vanilla extract; 3 cups all-purpose flour ((375g)); ¾ teaspoon baking powder; ¼ teaspoon baking soda; ½ teaspoon salt; ½ cup unsalted butter ((113g)); 1 cup powdered sugar ((125g)); ¼ teaspoon salt; food coloring (optional); sprinkles, for decorating (optional)