In a large bowl, sift together the flour, powdered sugar, salt, baking powder, and cocoa powder. This ensures all the dry ingredients are evenly distributed and lump-free.
3. Add Wet Ingredients
Add the vegetable oil, softened butter, egg, and a pinch of vanilla to the dry ingredients.
4. Form the Dough
Mix everything together using a spatula or your hands until a soft dough forms. Make sure all the ingredients are well combined and the dough is smooth.
5. Shape the Cookies
Take small portions of the dough and roll them into balls, about the size of a walnut.
Flatten each ball slightly and make a small indentation in the center with your thumb.
Fill the indentation with a small amount of chocolate paste.
