Add butter and sugar in a bowl, and mix. Add egg yolk, and mix some more.
Add almond flour, and mix.
Sift in the cake flour and fold in with a spatula until there are some flour streaks.
Add chocolate chips and mix. Now the dough is done.
Divide the dough into 2, wrap in plastic wraps, then shape into rolls. Let sit in the freezer overnight. I also made a dough with cocoa powder.
Slice into 5 mm. Place on a baking sheet, and bake for about 16 minutes at 170℃ / 340℉.
Story Behind this Recipe
I uploaded this recipe because I baked these cookies as a present for my friend who loves chocolate.
When I made the dough with cocoa powder, I used 90 g of cake flour and 12 g of cocoa powder. When you cut the dough, if it breaks apart because the knife is touching the chocolate chips, just fix the shapes a little bit by hand. Alternatively, you can cut out shapes with cookie cutters.