The night beforeIn a large bowl, add sourdough starter, 240 g / 2 cups flour, and milk. Stir with a spoon until combined. Cover with plastic wrap and let sit overnight, or longer, at room temperature.
The next dayAdd 90 g / ¾ cup flour, sugar, salt, and baking soda. Stir to combine.
Roll out dough onto floured surface and knead for 4-5 minutes. If your dough is wet and sticky, slowly incorporate additional flour until it's tacky but no longer sticky.
With a floured rolling pin, roll dough to ¾ inch thickness. With a drinking glass or round pastry / cookie cutter, cut out muffins. You should end up with about 6-8 English muffins.
Dust each side with cornmeal and let them rest on parchment paper for 45 minutes.
Preheat a large pan on the stove to medium heat. Cook English muffins for about 6-8 minutes per side, careful not to burn them, until they are ready. Allow English muffins to cool before slicing and using.
Keyword English Muffins, Sourdough, Sourdough English Muffins