Toast the flour in a frying pan over low-medium heat, stirring continuously with a wooden spoon until light brown in color. (Approximately 10-12 min, you should be able to smell it as it toasts!)
Transfer the toasted flour to a large mixing bowl. Add the rest of the dry ingredients, including the freeze-dried strawberries, and mix together. Set aside.
Melt the butter in separate bowl. You can use a microwave or heat it up in a saucepan.
Add the melted butter into the bowl with the dry ingredients then mix until it's incorporated. Add the vanilla extract and mix.
Form desired polvoron shapes by packing the warm mixture (about 2 tablespoons each) into the polvoron molder.
Cool in the refrigerator for at least 30 minutes or until firm.
*Optional: Wrap polvoron with cellophane.