Gather the ingredients so you have everything close at hand on the counter or table.
Prepare Skillet for Cooking
Heat butter in microwave for a few seconds until melted.
Warm the skillet over low heat. Lightly spray the skillet with cooking oil. Place crumpet rings in the skillet and cover with lid for a few minutes to warm. When the skillet is nicely warmed, remove the lid and generously brush the melted butter along the inside of the crumpet rings, using the long-handled tongs to hold the rings.
Make the Batter
While the skillet is warming, prepare the batter. Place unfed starter in a medium-sized bowl. Add to this the cold water, granulated sugar, and kosher salt.
When the skillet has fully warmed, finish the batter by adding the baking soda to the sourdough mixture. Rapidly whisk the batter to combine. You will see a difference in the batter now that the baking soda has been added. (I like to add the baking soda right before I cook the crumpets for ultimate rise.)
Cook the Crumpets
Using a cookie/muffin scoop, spoon batter into each of the prepared crumpet rings. The batter will immediately sizzle, like a pancake, and will fill the rings to about half full.
Cook on low for about 1 minute until bubbles start to appear on the tops. Place the lid on the skillet and continue cooking for 4-5 minutes. (Cooking the crumpets with the lid on helps to cook the centers of the crumpets.)
Remove the lid, and if necessary, continue cooking for 1-2 minutes until the tops are dull and opaque. The tops should now be full of small indentions–the signature mark of a true crumpet.
Carefully remove the rings, then turn the crumpets in the skillet. If desired, cook the crumpets for another 1-2 minutes to lightly brown the tops. This step is optional.
Traditional English crumpets are not browned on the top, so feel free to stop before this step. Instead you may toast the crumpets before serving.
If necessary, clean the crumpet rings, then repeat the above steps for the remaining batter. Or if you’ll be making this recipe a lot or for many people, you may want to purchase 2 sets of rings for a total of 8!
Serve warm crumpets with a pot of hot tea and with butter, your favorite jam, or honey. Make 6-8 crumpets.
Notes
My crumpet rings measure 3 1/4″ in diameter and are about an inch tall. I use a 2 oz blue Vollrath scoop, which fills the rings a little over half full. If you use another type of ring, such as for English muffins or egg rings, the size may be different, so keep that in mind when filling them. This may also effect the number of crumpets made.