1½ cups (360 grams) warm milk (120°F/49°C to 125°F/52°C)
1½ tablespoons (18 grams) granulated sugar
1 tablespoon (14 grams) unsalted butter, melted
¾ cup (180 grams) warm water (120°F/49°C to 125°F/52°C)
1 teaspoon (3 grams) kosher salt
1 teaspoon (5 grams) baking soda
½ teaspoon (2.5 grams) baking powder
Clotted cream, butter, or jam, to serve
Instructions
In a medium bowl, whisk together flours and yeast. In a small bowl, stir together warm milk, sugar, and melted butter until sugar is dissolved. Pour milk mixture over flour mixture, and beat with a wooden spoon until a smooth batter forms, 3 to 4 minutes. (This will be hard work but is needed to produce holes in the crumpets.) Cover with plastic wrap, and let rise in a warm, draft-free place (75°F/24°C) until doubled in size, about 1 hour.
In a small bowl, stir together ¾ cup (180 grams) warm water, salt, baking soda, and baking powder. Add water mixture to batter, stirring until incorporated. Cover and let rest in a warm, draft-free place (75°F/24°C) for 20 minutes.
Lightly grease the inside of 4 English muffin rings and a flat griddle. Set rings on griddle. Heat griddle over medium-low heat (300°F/150°C). Spoon ¼ cup batter into each ring. Cook until bubbles have appeared and surface is set, about 4 minutes. Using tongs or pot holders, carefully remove rings from crumpets. Turn, and cook until lightly golden, 2 to 3 minutes. Repeat procedure with remaining batter. Serve immediately with clotted cream, butter, or jam. Store in airtight container at room temperature for up to 4 days. Toast and enjoy.
Recipe by Bake from Scratch at https://bakefromscratch.com/traditional-crumpets/