Step 1

Position a rack in the middle of the oven and preheat to 425 degrees. Line a large rimmed baking sheet with parchment paper.

Step 2

In a large bowl, whisk together the flours, sugar, baking powder and 1 teaspoon of the salt. Add the cream and stir with a flexible spatula until no loose flour remains. Using a 1/4-cup measuring cup, scoop the dough into 9 biscuits, and evenly space them on the prepared baking sheet. In a small bowl, whisk together the egg and the remaining 1/8 teaspoon of salt, and lightly brush each biscuit with the egg wash.

Step 3

Bake for 20 minutes, rotating the pan halfway through, or until the tops and bottoms of the biscuits are nicely browned. Transfer the baking sheet to a wire rack and let cool for about 5 minutes before serving with the butter and jam.