In a bowl combine Bisquick, sugar and baking powder together. Then pour in milk and slice cold butter into small thin pieces. Use a pastry cutter to blend together. STOP when powder is incorporated, over mixing will make then dense.
Preheat oven to 450 degrees F. Use 1 tbsp of Bisquick to lightly "flour" a cutting board. Transfer dough to board and roll out to 1/2" thick.
Use a round cookie cutter to make about 12 total round biscuits. Place on a cookie sheet lined with parchment paper or lightly sprayed with non stick cooking spray.
Whisk together melted butter and minced garlic in a dish, brush on the top of each one. Bake for 8-10 minutes, just until the tops are golden brown and middle is no longer sticky, check with a toothpick.
Remove, take biscuits off of hot baking sheet and on to a cooling rack or enjoy immediately.