Preheat oven to 400 degrees.
Line a baking sheet with parchment or a silicone mat.
In a large mixing bowl, whisk together flour, sugar, baking powder, salt and garlic. Cut on the butter using your fingers or a pastry cutter until the mixture clumps together and there are a few pea-sized pieces of butter left. Fold in the shredded cheddar.
In a separate bowl, beat together the egg and the milk. Add to the flour mixture and mix gently until mixture just beings to come together.
Turn mixture onto counter and knead five or six times, until mixture comes together into a slightly sticky dough.
Divide dough into three equal portions and shape each portion into a disk about 1” thick. Cut each disk into four equal wedges and place on prepared baking sheet.
Bake in a preheated oven for 17-20 minutes or until golden brown.