📖 Instructions

1. Get Ready: Start by preheating your oven to 375°F (190°C). Line two large baking sheets with parchment paper. This helps prevent sticking and makes cleanup a breeze!
2. Cream the Fats: In a large mixing bowl, either with a stand mixer fitted with the paddle attachment or using a hand-held electric mixer, cream together the softened unsalted butter and granulated sugar on medium speed until the mixture is light, fluffy, and pale yellow. This usually takes about 2-3 minutes. Make sure to scrape down the sides of the bowl periodically with a rubber spatula to ensure everything is well combined.
3. Add Wet Ingredients: Beat in the large egg and pure vanilla extract until just combined. Don't overmix here; we just want everything incorporated.
4. Combine Dry Ingredients: In a separate, medium-sized bowl, whisk together the all-purpose flour, baking powder, and salt. Make sure there are no lumps.
5. Gradually Add Dry to Wet: Slowly add the dry ingredient mixture to the wet ingredients, mixing on low speed until the dough just comes together. Be careful not to overmix the dough, as this can result in tough cookies. The dough should be soft but not sticky.
6. Chill the Dough: Divide the dough in half. Flatten each half into a disc, wrap it tightly in plastic wrap, and refrigerate for at least 30 minutes, or up to 2 hours. This chilling step is SUPER important—it prevents the cookies from spreading too much and helps them hold their shape. Patience, my friend!
7. Roll it Out: On a lightly floured surface (you can also roll between two sheets of parchment paper if you prefer, it's less messy!), roll one disc of chilled dough to about 1/4-inch thickness.
8. Cut the Shapes: Use your favorite cookie cutters to cut out shapes. Carefully transfer the cut-out cookies to your prepared baking sheets, leaving about 1 inch between each cookie. Re-roll any dough scraps, chill briefly if they become too warm, and cut more cookies.
9. Bake Away: Bake for 7-10 minutes, or until the edges are lightly golden. The centers might still look a little soft, and that's okay! They will firm up as they cool. Do not overbake!
10. Cool Down: Let the cookies cool on the baking sheets for about 5 minutes before carefully transferring them to a wire rack to cool completely. They must be completely cool before frosting.
11. Sift the Sugar (for frosting): In a medium bowl, sift the powdered sugar to remove any lumps. This is key for a super smooth frosting.
12. Cream Butter (for frosting): In a large bowl with your electric mixer, beat the softened unsalted butter on medium speed until creamy, about 2 minutes.
13. Add Liquids (for frosting): Gradually beat in the sifted powdered sugar, alternating with the heavy cream and vanilla extract. Start on low speed to avoid a sugar cloud, then increase to medium-high.
14. Whip it Good (for frosting): Continue beating until the frosting is light, fluffy, and smooth. This could take 3-5 minutes. If it's too thick, add a tiny bit more cream; if too thin, add a little more sifted powdered sugar.
15. Swirl Time!: Once the cookies are completely cool, transfer the frosting to a piping bag fitted with a star tip (or a round tip for a simpler look). Pipe beautiful swirls or designs onto each cookie. For a classic swirl, start from the outer edge and move inwards, or create a lovely zig-zag pattern.
16. Serve and Enjoy!: Let the frosting set slightly (this takes about 15-30 minutes) before stacking or storing. Then, share these delightful treats and watch the smiles appear!