Whisk together flour and salt in a large bowl. Form a well in the center. Add milk, melted butter, and eggs. Beat until the batter is completely smooth (no lumps), the consistency of whipping cream.
Let sit 1 hour.
Preheat oven to 450º.
Add drippings to 9 x 13 casserole dish, coating the bottom of the dish. Heat the dish in oven for 10 minutes. ***If using muffin tin, add 1 tsp. drippings to each well and place in oven for a couple minutes.***
Pour batter into dish once the pan is hot.
***Or fill muffin tins ⅓ full***
Cook 15 minutes at 450º then reduce the heat to 350º and cook for 15-20 more minutes,
until puffy and golden brown.
***Adjust cooking times for muffin tins***
Cut into squares or remove from tins and serve.