- Preheat the oven to 170 degrees Celsius.
Mix with your kitchen robot the vegetable shortening and butter until softened. Add the sugar and mix for about two minutes at medium speed. Add the egg yolk, vanilla, and a pinch of salt.
Add the flour and reduce the speed. Mix for one minute, turn off your kitchen robot and finish mixing with your hands until you form a sandy but compact mass.
Make balls of approximately two centimeters and, pressing a little in the center of the balls with your thumb, give them the shape of the Mantecaditos.
Add the jam of your choice in the center of the cookies and bake for 13 minutes.
