Beat soft butter with sugar and oil, with a whisk or a hand mixer

Add eggs, flavorings and mix well

Sift cocoa powder making sure it's well integrated

Add sifted dry ingredients in 2 parts, beating only until it's integrated

Finish with a spatula to prevent overbeating; cover and refrigerate

Scoop portions of chilled dough, place on parchment-lined cookie sheets and bake

Beautifully plump and crackled

Fill with thick cream cheese mixture and sandwich together

Or try them filled with Dulce de Leche