Melt the butter or oil in a round, glass or ceramic ramekin.

In a separate pinch bowl, mix baking soda and apple cider vinegar together. Set aside.

Add all the rest of ingredients to the ramekin, and whisk or stir with a fork very briskly.

Add the baking soda and apple cider vinegar mixture to the ramekin, and stir in well.

Stir, scraping sides , until clump free, may have to stab at some stubborn clumps.

Bake in the oven at 400°F for 12 to 15 minutes, until middle is firm.

Take a knife between the bowl and muffin and slide around to loosen edges.

Cool and halve.

Toast in a buttered or oiled frying pan, until lightly browned on each side ( like a pancake) this is an important step, do not skip.