Step 1: Preheat the oven to 350°F (175°C) to ensure even baking.
Step 2: Line your cookie sheets with parchment paper.
Step 3: In a large mixing bowl, combine softened butter and cake mix. Beat until creamy, then add eggs and vanilla extract, mixing until fully incorporated.
Step 4: Drop rounded balls of dough onto prepared baking sheets, leaving 2 inches of space between each cookie.
Step 5: Bake for 10-12 minutes, until edges are lightly golden.
Step 6: Cool cookies on the baking sheets for 5 minutes, then transfer to a cooling rack.
Step 7: In a separate bowl, beat together softened butter, powdered sugar, vanilla extract, and heavy cream until smooth.
Step 8: Once cookies are cooled, frost them and add sprinkles if desired.
