Blend the cottage cheese in a small blender or food processor until completely smooth.
In a large bowl, beat the butter and sweetener until creamy. Add the blended cottage cheese, egg yolk, vanilla, and almond extract, and beat until smooth.
Whisk together the almond flour, coconut flour, baking powder, xanthan gum, and salt, then stir into the wet mixture until a smooth dough forms. Chill for 30 minutes.
Preheat the oven to 350°F and line a baking sheet with parchment paper.
Roll the dough into 1 tbsp balls and place them 1 1/2 inches apart. Press your thumb or the back of a teaspoon into the center of each ball to make a deep well, smoothing any cracks around the edges.
Fill each well with about 1/2 tsp of raspberry jam.
Bake for 13 to 15 minutes, until the edges are lightly golden. Cool on the baking sheet for 15 minutes, then dust with powdered sweetener.