Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper.

In a large bowl, whisk together all-purpose flour, whole wheat flour, baking powder, and salt until well combined.

Grate cold butter into the flour mixture, and work in gently until it resembles coarse crumbs.

Create a well in the center, pour in milk and honey, and stir until a dough forms.

On a floured surface, knead the dough for about 30 seconds until smooth, then roll out to 1-inch thickness.

Use a biscuit cutter to cut out biscuits, reshaping any remaining dough.

Place on the prepared baking sheet, brush tops lightly with milk, and leave space between them.

Bake for 13-15 minutes until puffed and golden brown; cool slightly before serving.