Preheat your oven to 350°F (175°C) and prepare baking sheets with parchment paper.

In a large bowl, combine the flour, sugar, baking powder, and salt.

Cut in the cold butter until the mixture resembles coarse crumbs.

In another bowl, whisk together the heavy cream, milk, egg, vanilla extract, and strawberry preserves.

Pour the wet ingredients into the dry ingredients and mix gently.

Turn the dough onto a floured surface and shape it into a rectangle.

Cut the dough into squares and then diagonally into triangles.

Place scones on the baking sheet and bake for 20 minutes or until lightly golden.

Transfer baked scones to a cooling rack.

In a bowl, whisk together melted butter, powdered sugar, and milk to make a glaze.

Drizzle the glaze over the cooled scones and let it set before serving.