Toast flour in a separate pan until light brown, stirring to prevent burning.
Mix toasted flour, ube powder, and sugar in a bowl.
Melt butter in a saucepan over low heat.
Gradually combine melted butter with the dry mixture until it forms a crumbly texture.
Add milk one tablespoon at a time, mixing until it forms a cohesive ball.
Shape the mixture into polvoron using molds or by hand.
Refrigerate for about an hour to firm them up.
Individually wrap polvoron in colorful cellophane paper once set.