Ube Milk Crinkles

Name: Ube Milk Crinkles
Ingredients: 1¼ cups (156 g) all-purpose flour, plus extra for dusting; 1 tsp. baking powder; ¼ tsp. kosher salt; 1 stick (113 g) unsalted butter, melted and cooled completely; ⅔ cup (133 g) granulated sugar, plus extra for rolling; ½ cup (124 g) ube halaya, at room temperature; 1 Tbsp. (7 g) malted milk powder; 1 large egg, at room temperature; 1 tsp. ube paste; 75 g white chocolate, finely chopped (about ⅓ cup)