Ingredients
- Neutral oil
- 1 cup unfed starter or sourdough discard
- 1 teaspoon sugar
- ½ teaspoon salt
- ½ teaspoon baking soda
- Cooking spray
- Butter
Preparation
Rub some oil on your cast iron and put it over medium-low heat to let it heat up.
Put your starter in a small bowl and stir in sugar, salt, and soda. It should bubble up and quickly double in size, growing to be about 3–3½ cups. Spray three Mason jar rings with cooking spray and set them in the pan for your crumpet molds, lip side down. Melt a small pat of butter in each. (You have to repeat this step for your next batch—greased molds are key.) Your cast iron should not get too hot—you’re looking for a heat you can hold your hand over for a few seconds without burning yourself, maybe 300–325° F.
Using a ¼ cup measure, pour the batter into the hot forms. Cook until many of the bubbles have popped and the batter looks like a tiny cratered moonscape with only a few raw spots. Using a stout spatula, flip mold and crumpet. Once it’s flipped, you should be able to easily remove the mold. If it sticks on the edge, you might need to coax it out gently with a butter knife. Cook for 1 to 2 minutes on the second side, until it’s golden.
Serve immediately with butter and jam.