Get your oven to 425 degrees. This is a pretty hot oven, but that's exactly what you want for scones. It helps them bake fast and get golden. Grease a cookie sheet. You can use a little butter, cooking spray, or parchment paper, whatever works for you.
In a large mixing bowl, combine your flour, sugar, baking powder, and salt. Whisk these together so everything is evenly distributed. This takes about 30 seconds and makes a real difference in how your scones bake.
Now here's the magic step. Cut your cold butter into small pieces, about the size of small peas. Using a pastry blender or fork, work the butter into the dry ingredients until the whole mixture looks like coarse crumbs. This step is crucial because those little butter pieces create pockets that steam up when baking, giving you that flaky texture. Don't skip it or rush it. If your kitchen is really warm, you can stick the flour-butter mixture in the fridge for a few minutes before proceeding. Cold butter equals flaky scones.
In a small bowl, beat together the heavy cream and egg. Add this mixture to your flour-butter mixture along with the craisins and orange zest. Mix just until the dry ingredients are moist. Seriously, stop there. Don't overmix. Overmixing develops gluten, which makes tough scones. You want tender scones, so fold it together gently and call it done.
Turn the dough out onto a lightly floured surface and gather it into a ball. Pat it into a circle about 3/4-inch thick. It doesn't need to be perfectly round or even. Rustic is actually more appealing.
Cut the circle into 8 wedges, like you're cutting a pizza. You should end up with 8 nice triangular scones.
Place the wedges on your greased cookie sheet. Here's where you have creative control: sprinkle sugar on top. The recipe says the amount is up to you. I usually do a light sprinkle because I like the tartness of the cranberries to shine through. But if you like sweeter, go heavier. It's your scone. You could also brush them with a little egg wash (egg mixed with a tablespoon of water) before sprinkling sugar to make the sugar stick better and create a prettier top.
Bake for 12 minutes or until they're golden brown. At 12 minutes, they should be done, but every oven is different. If your oven runs cool, they might need a minute or two more. You're looking for a nice golden-brown color on top and a scone that's baked through but still tender inside.
Let them cool for a few minutes on the cookie sheet, then transfer to a cooling rack or serve warm. These are best served warm or at room temperature. They're delicious plain, with butter, with cream cheese spread, or with jam.