Step 1

Pre-heat oven to 80C / 60C fan and line a couple of large baking trays with baking parchment.

Step 2

Slice the lemons thinly using a very sharp knife. Discard any slices that are slightly ripped as these have a tendency to burn.

Step 3

Place the lemon slices on the baking trays.

Step 4

Bake in the oven for 2 hours.

Step 5

Turn each lemon slice over.

Step 6

Bake for a further 2 hours (*see notes)

Step 7

Remove lemon slices from oven which should be golden and crisp to touch.

Step 8

Leave to cool before processing in the grinder.

Step 9

Grind the lemon slices in batches. Place a small amount of the dried lemon slices in the spice grinder (about 10). Use the guide on your grinder to confirm the maximum amount you can fill it.

Step 10

Grind the slices for about a minute using the instructions on your grinder. The lemon slices will turn into a golden powder. You may need to give the powder a second grind to get a really fine powder.

Step 11

Store the lemon powder in an airtight glass jar in a cool dark place for up to a year.