01 -
In a medium bowl, whisk together the flour, baking powder, baking soda, and salt until evenly mixed.
02 -
In a large mixing bowl, beat the softened butter and granulated sugar using a hand or stand mixer until light and fluffy, about 2 minutes.
03 -
Mix in the egg, sour cream, and vanilla extract until the batter is smooth and thoroughly combined.
04 -
Gradually add the dry ingredient blend to the wet ingredients, stirring just until incorporated to maintain tenderness.
05 -
Divide the dough into two equal portions, shape each into a disc, wrap tightly in plastic wrap, and refrigerate for at least 1 hour or overnight.
06 -
Preheat the oven to 350°F and line baking sheets with parchment paper.
07 -
On a lightly floured surface, roll out the chilled dough to about ¼-inch thickness. Cut into desired shapes with cookie cutters and place on prepared baking sheets.
08 -
Bake for 8 to 10 minutes or until edges are lightly golden. Cool on the baking sheet for 2 minutes, then transfer to a wire rack to cool completely.
09 -
Beat the softened butter in a medium bowl until creamy. Gradually incorporate powdered sugar, then mix in vanilla extract and 1 to 2 tablespoons milk until spreadable.
10 -
If desired, divide frosting and add food coloring. Spread or pipe onto cooled cookies, garnish with sprinkles or decorations, and allow frosting to set before storing.