Cream the Butter and Sugar: In a large bowl, beat the softened butter and granulated sugar together until light, pale, and fluffy.

Add Eggs, Sour Cream & Vanilla: Add the eggs one at a time, mixing well after each addition. Blend in the sour cream and vanilla extract.

Combine the Dry Ingredients: In a separate bowl, whisk together the flour, baking powder, baking soda, and salt. Gradually add the dry ingredients to the wet mixture, mixing until just combined.

Chill the Dough: Cover the dough and chill for at least 1–2 hours.

Shape & Bake: Preheat the oven to 350°F (175°C). Scoop the dough into 1.5-inch balls and gently flatten them. Bake 8–10 minutes.

Cool: Let the cookies cool completely before frosting.

Frost the Cookies: Prepare the frosting by beating butter until smooth, then adding powdered sugar, vanilla, salt, and cream.