Preheat: Preheat your oven to 425°F (220°C). Place a muffin tin or Yorkshire pudding tray in the oven to heat up.
Make Batter: In a mixing bowl, whisk together the gluten-free flour and salt. Gradually add the milk and eggs, whisking until smooth and lump-free. Let the batter rest for 15-30 minutes.
Heat Fat: Remove the preheated tray from the oven. Add about ½ teaspoon of fat to each cavity and return the tray to the oven until the fat is sizzling hot.
Bake: Quickly pour the batter into the hot fat-filled cavities, filling each about halfway. Bake for 20-25 minutes without opening the oven door. The puddings should puff up and turn golden brown.
Serve: Serve the Yorkshire puddings immediately while they are hot and crisp.
Notes
See notes in post for tips, storing, reheating and substitutions