In a bowl add the cornstarch, wheat flour, sugar and butter.
To make the cookies, add the milk gradually, until the dough is consistent to roll.
Make balls, then add the guava paste cut into comics, pushing slightly into the balls until they are a little “flattened”.
Place on a baking sheet, there's no need to grease the pan, because the cookies are buttery, they don't stick!
Let it bake for about 10 minutes, but always keeping an eye on it, it bakes very quickly, the right point is when the underside of the cookie is golden.