01 - In a large bowl, beat the softened butter and cream cheese with an electric mixer until smooth and creamy, approximately 2 minutes.
02 - Add the granulated sugar and beat until the mixture is light and fluffy, scraping down the sides of the bowl as needed.
03 - Mix in the egg and vanilla extract until well combined and the batter is uniform.
04 - In a separate bowl, whisk together the flour, baking powder, and salt. Gradually add the dry mixture to the wet ingredients, mixing until just combined. Do not overmix.
05 - Cover the dough tightly and refrigerate for at least 30 minutes to firm up for easier handling.
06 - Preheat the oven to 350°F. Line two baking sheets with parchment paper.
07 - Scoop heaping tablespoons of dough onto the prepared baking sheets, spacing them approximately 2 inches apart.
08 - Use the back of a spoon to gently press an indentation into the center of each dough portion.
09 - Place about 1/2 teaspoon of slightly cooled caramel sauce into each indentation. Swirl gently with a knife or toothpick for a marbled effect.
10 - Bake for 11 to 13 minutes, or until the edges are lightly golden. The centers may appear slightly underdone but will set as they cool.
11 - Allow the cookies to rest on the baking sheet for 5 minutes, then transfer to a wire cooling rack to cool completely.