Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a mixing bowl, cream together the softened butter and granulated sugar using an electric mixer or whisk until light and fluffy, about 3-5 minutes.
Add the almond extract and mix until well combined.
In a separate bowl, whisk together the all-purpose flour and salt. Gradually add this mixture to the butter mixture, stirring until just combined.
Scoop out tablespoon-sized portions of dough and roll them into balls. Place them on the prepared baking sheet, spacing them about two inches apart.
Using the back of a spoon or a melon baller, create an indentation in the center of each dough ball.
Fill each indentation with a small amount of raspberry jam, about half a teaspoon, being careful not to overfill.
Sprinkle sliced almonds on top of each cookie for added texture and flavor.
Bake in the preheated oven for 12-15 minutes, or until the edges are lightly golden.
Remove from the oven and let the cookies cool on the baking sheet for 5 minutes before transferring them to a cooling rack to cool completely.