Preheat the oven to 350 degrees and line a baking sheet with parchment paper.
In a large bowl, beat the butter and sugar together on medium speed until light and fluffy, about two minutes.
Add in the lemon juice and lemon zest (zest is optional) and mix until well incorporated.
Add the flour to the butter and sugar mixture and beat on low until well combined. Dough will be on the drier side and crumbly.
Using a tablespoon scoop out cookie dough and shape into balls. Do not be tempted to make them bigger, this cookie works best in this small size!
Set the dough balls on the baking sheet about two inches apart. Using your thumb, firmly but gently press down on each dough ball to create a well in the center for the raspberry or lemon preserves.
Place 1/2 teaspoonful of preserves into each cookie.
Bake For 9-11 minutes, or until the cookie are lightly golden brown on the edges.