Preheat the oven to 400°F (200°C).

Combine in a small bowl the all-purpose flour, baking powder, and salt.

Microwave the frozen blueberries for 30 to 45 seconds, then mash with a fork until smooth.

Cream the softened vegan butter and granulated sugar together in a stand mixer until light and fluffy.

Incorporate the cooled, mashed blueberries into the butter mixture.

Gradually add the dry flour mixture into the wet ingredients, combining until a sticky dough forms.

Fold in the white chocolate morsels.

Chill the dough in the freezer for 30 minutes.

Form the dough into 12 balls and place them on a parchment-lined baking sheet.

Bake for about 10 minutes, until the edges are light brown.