Foolproof Cream Scones

Ingredients
2 cups (240 grams) white whole-wheat flour
2 tablespoons (28 grams) demerara sugar, plus more to sprinkle on top
3 1/4 teaspoons baking powder
1 teaspoon kosher salt
1 1/2 cups (353 grams) cold heavy cream, plus more to brush
https://food52.com/blog/23686-easy-cream-scones-recipe-no-butter-big-little-recipes