1 cup (2 sticks) butter, softened
1 1/2 cups sugar
3 large eggs, beaten
1 cup sour cream
2 tablespoons vanilla extract
3 1/2 to 4 cups all-purpose flour
2 teaspoons baking powder
1 teaspoon baking soda
1/3 cup shortening
1 teaspoon vanilla
4 cups powdered sugar
1/2 cup milk
Food coloring (optional)
Colored sprinkles, for decorating (optional)
Chocolate chips, for decorating (optional)
To make the frosting: Cream the shortening with the vanilla and 1 cup of the powdered sugar. Gradually add the milk and the rest of the powdered sugar, beating constantly. More powdered sugar can be added to give you your desired thickness. Food coloring can also be added if you like. Spread the frosting on the cookies and decorate with colored sprinkles or chocolate chips. Let the frosting set before storing.
Preheat the oven to 350°F. Lightly grease a baking sheet.
Cream the butter and sugar together in a large bowl. Stir in the eggs, sour cream, and vanilla.
Combine the flour, baking powder, and baking soda in a medium bowl and stir with a whisk to blend. Add the dry ingredients to the wet ingredients and stir until a soft, firm dough is formed.
Roll the dough out to a 1/2-inch thickness on a floured surface.
Use your favorite shaped cookie cutters to cut out the dough. Place the shapes on the prepared pan.
Bake until golden brown around the edges, about 10 minutes. Remove from the oven and let cool on the pan for 5 minutes, then transfer to wire racks to cool completely.