1cup(250ml) buttermilk(or 250ml milk with 2 teaspoons white vinegar or lemon juice stirred in and left for 5 mins)
Butter or oilfor frying
Wring the grated potato out in a clean tea towel to dry it out a little. Discard the starchy water.
Add all ingredients except the buttermilk to a mixing bowl and stir well to combine.
Stir in the buttermilk to make a thick batter.
Heat a little oil or butter in a frying pan over a medium/low heat, then add tablespoonfuls of the boxty batter and fry until golden and cooked though, about 5 minutes per side. Flip and cook the other side.
If making batches, keep them warm in the oven.
You can use leftover mashed potatoes.
If you don't have buttermilk, just sour regular milk with lemon juice or vinegar.
Instead of buttermilk, you could also use watered down plain yogurt.
Boxty take longer to cook than pancakes, since you need to cook the grated potato. Keep the heat to medium/low and let them cook until golden.
Don't leave out the baking soda. It reacts with the buttermilk to make the pancakes light and fluffy.
Add a handful of chopped scallions into the mixture.
Try it with double the raw grated potatoes and leave out the mashed potatoes.
Add some grated cheese into the batter for a cheesy boxty recipe.