Step 1

Preheat oven to 400 degrees and line a baking sheet with parchment paper (or spray with cooking oil).

Step 2

Mix together flour, sugar, baking powder, salt, and orange zest. Cut in cold butter with a pastry cutter (or using a standing mixer) and mix the dough until the butter is about the size of peas, and the dough resembles coarse crumbs. Set aside.

Step 3

In a small bowl, whisk egg, sour cream, heavy cream, and vanilla extract. Mix with the dry ingredients and stir until just combined.

Step 4

Turn the dough out onto a floured surface, and pat into a 1" thick circle. Cut into 8 triangles. Place scones on parchment lined baking tray, making sure the scones are evenly spaced apart.

Step 5

Brush the tops of each scone with a little bit of heavy cream, and bake for 15-16 minutes, or until scones are golden brown.

Step 6

While the scones are cooling, mix together melted butter, powdered sugar (starting with 1 cup), vanilla extract, orange juice, and orange zest. If the glaze seems too thin, add in the last 1/2 cup of powdered sugar.

Step 7

Pour the glaze over the scones and enjoy!