Preheat your oven to 400°F (204°C) and line a baking sheet with parchment paper.

In a large mixing bowl, combine all-purpose flour, salt, ground black pepper, baking powder, baking soda, and light brown sugar.

Cut very cold unsalted butter into small cubes and blend with dry mixture until it resembles coarse meal.

In a separate bowl, whisk together the large egg, plain full-fat yogurt, and whole milk until well combined.

Pour the liquid mixture into the dry ingredients and stir until just moistened.

Fold in the shredded cheddar cheese, diced ham, and chopped scallions until uniformly distributed.

Transfer the dough onto a floured surface and shape it into an 8-inch circle, cut into 8 wedges.

Place the wedges on the prepared baking sheet and bake for 18-20 minutes until golden brown.

Allow the scones to cool on the baking sheet for about 5 minutes before serving.