Line a baking sheet with parchment paper to prevent sticking and ensure even baking.
In a large bowl, cream together the softened unsalted butter and granulated sugar until light and fluffy, which typically takes about 3-5 minutes.
Beat in the eggs one at a time, mixing well after each addition before stirring in the lemon zest and vanilla extract for that signature flavor burst.
In another bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt until well combined before gradually adding them to your wet ingredients.
Gently fold in the raspberry preserves into the dough, being careful not to overmix; you want those beautiful swirls!
Drop rounded tablespoons of dough onto your prepared baking sheet, spacing them about 2 inches apart, then bake for 10-12 minutes until edges are lightly golden before cooling on a wire rack.