Toss frozen berries in a bowl with powdered sugar, and then place into the freezer until needed. (Cut strawberries in half.)
Preheat your oven to 425°F (200°C). Line a baking sheet with parchment paper. In a large bowl, whisk together the all-purpose flour, sugar, baking powder, and salt.
Using a food processor, pastry cutter, or your fingertips, cut the butter into the flour mixture until it resembles coarse crumbs with pea-sized pieces of butter. Butter should be reduced to a pea size.
Make a well in the center of the flour and place to the side.
Combine wet ingredients by beating the eggs, sourdough discard, milk, and vanilla extract together.
Pour the wet ingredients into the center of the well.
Gently fold the flour into the wet ingredients until the dough just begins to come together. Be careful not to overmix. The dough should be a very shaggy dough. At this point you can do a long fermentation on the dough by placing a piece of plastic wrap over the large bowl and putting it into the fridge overnight for 12-24 hours prior to baking. Alternatively you can proceed to adding the berries and baking after mixing the dough.
Gently fold in the mixed berries, being careful not to crush them or over mixing the dough. It is best to add them directly from the freezer to prevent bleeding into the dough. Turn the dough out onto a lightly floured surface and gently pat it into a round disc about 1 inch thick.
Cut the dough into 8 wedges (like a pizza) or shape it into smaller rounds, if you prefer. Place the scones on the parchment-lined baking sheet. Bake for 14-17 minutes, rotating the baking sheet half way through baking. While the scones are baking, mix the glaze by combining the melted butter and honey.
Remove scones from oven, and brush the honey glaze on the tops of the scones. Place scones on a wire rack to cool for about 10 minutes before serving. Enjoy them warm with a cup of tea or coffee! Store scones in an airtight container.