Lemon chia chocolate cookies

INGREDIENTS DIRECTIONS
 * 250g butter
 * 2 ½ cup flour
 * ¾ cup sugar
 * zest of 2 lemons (about 2 tablespoons)
 * 3 Tbsp chia seeds
 * 1 cup dark chocolate
 * Put the cold butter, flour, sugar and Meyer lemon zest in a large bowl and mix with cold hands to combine.
 * Place dough ball in the fridge for 30 minutes.
 * Preheat the oven to 360 degrees F.
 * Use a sharp knife to slice the dough roll in 0.2 inch slices and place them on a lined baking sheet.
 * Bake the cookies in the oven for 20 minutes or until light golden brown. Let them cool on a wire rack.
 * Once the cookies are completely cooled off, you start melting 2/3 of the chocolate in a double boiler. Keep stirring and transfer the pan to the counter once the chocolate is melted. Add the remaining chocolate and stir again till all chocolate is melted.
 * Dip the (cooled!) cookies in the chocolate and place them on parchment paper until the chocolate sets. This will take at least 30 minutes.