I highly recommend using a stand mixer to make a large batch of scone dough. A regular 5-quart Kitchen Aid mixer can accommodate up to 2x the recipe amount, depending on the add-ins. If you intend to make more than double, it's best to make the scone dough in batches. To make the scone dough in a stand mixer, paddle the dry ingredients together in the mixer bowl. Switch to a dough hook attachment. Pour in the wet ingredients. Start at low speed, but before the dough comes together, tip in the add-ins and stop the mixer once the dough is just moistened. Proceed with the rest of the recipe steps.