01 - Preheat oven to 350°F. Lightly grease a 24-cup mini muffin tin with cooking spray or butter.
02 - In a medium bowl, whisk together flour, baking soda, and salt until well combined. Set aside.
03 - In a large bowl, beat softened butter and granulated sugar with electric mixer on medium speed until light and fluffy, approximately 2 minutes.
04 - Add egg and vanilla extract to butter mixture. Beat until fully incorporated, scraping down sides of bowl as needed.
05 - Gradually add dry ingredients to wet ingredients, mixing on low speed just until dough comes together. Do not overmix.
06 - Scoop approximately 1 tablespoon of dough into each muffin cup. Press gently into bottom and up sides to form cup shape, ensuring even thickness.
07 - Bake for 10 to 12 minutes or until edges are lightly golden brown.
08 - Remove from oven. While still warm, gently press center of each cookie with back of spoon to deepen cup indentation. Cool in tin for 10 minutes, then transfer to wire rack to cool completely.
09 - In chilled bowl, whip heavy cream, powdered sugar, and vanilla extract with electric mixer on high speed until stiff peaks form.
10 - Pipe or spoon whipped cream into cooled cookie cups. Top with fresh berries, sprinkles, or mini chocolate chips as desired. Serve immediately or refrigerate until ready to serve.