Jay's:

480g flour
1.5tbsp white vinegar
Enough milk to make 1.75 cups
2 tsp baking soda
1 tsp kosher salt

Combine dry ingredients. Stir in acidified milk to form a dough.

Knead a few times, then put in a 9" pan and spread to the edges. Cut an X in the top.

Bake for 25-30 minutes covered@425, 10 minutes uncovered.

Natasha's Kitchen:

500g AP flour
50g sugar
1 tsp sea salt
1 tsp baking soda
6 tbsp cold butter
1 3/4 cups acidulated milk (as above)
1 egg

Preheat oven to 375F.

Whisk together dry ingredients. Cut butter into small pieces and work into flour until crumbs form.

Into a well in the center of the dry ingredients, pour the combined wet ingredients. Mix until dough just comes together.

Shape into a round loaf and transfer into a cast iron skillet. Score a large X into the top. Bake for 50-55 minutes.