Preheat oven to 450 (yes that's hot - but it works)

In an 8x8 or 9x9 microwave safe dish - melt butter in microwave. If you need to use metal, melt butter in a dish and pour it into the pan

While oven is preheating, measure out milk and add the vinegar

In a separate bowl, combine all dry ingredients

When oven is preheated, mix wet into dry and pour into pan over the butter. The butter will squish up over the batter - that's ok. You can score and slice the biscuits before baking but it's not imperative. Up to you. If you mix before the oven is preheated - it will raise BIG TIME and loose some of it's umpf when you put it in your baking dish - so wait until you're ready to put it in the oven

Bake for approx. 25 minutes, remove from oven and let sit for 2-3 minutes and then slice.