Separate the egg white from the egg yolk and set it aside.
Mix the spelt flour, almond meal and a pinch of salt in a bowl. Add cold chopped butter, agave syrup, egg yolk and vanilla extract. Crumble the wet and dry ingredients together and knead them into a dough with your hands.
Wrap the dough into plastic wrap and chill it in the fridge for an hour.
Take the dough out of the fridge and cut it in half. On a floured surface, roll out one-half around 0,5 cm (0,2”). Sprinkle the rolling pin with flour as you roll to keep the dough on the surface and not stick to the rolling pin.
Cut out cookies with a cookie cutter. Gather the leftover scraps, knead them together, roll, and repeat the process. Continue with the other half of the dough and cookie cutter. Be sure to work quickly, so the dough won’t get too warm.
Preheat the oven to 180°C and line two baking sheets with parchment paper. Transfer the first batch of cookies onto the baking sheet and bake them for 8-10 minutes.
Take the cookies out of the oven and transfer the second batch of cookies onto the baking sheet. Bake for the same time. After baking, let them cool completely.
Once the cookies are cooled, add a dollop of jam to the cookie base. Sprinkle the tops with confectioners sugar and place them on top.