These are the cookies we chatted to Eleri Siôn about on BBC Radio Wales.
270g unsalted butter
160g caster sugar
160g dark brown sugar
1/4 tsp vanilla extract
380g plain flour
1 tsp salt
1 tsp bicarbonate of soda
1 tsp cinnamon
110g rolled oats
Heat up your oven to 170C degrees (325F) Gas make 3 and line two large baking trays with parchment.
Put the butter and sugars into a free standing mixer with the paddle attachment, and cream until light and fluffy.
Add the eggs one at a time, mixing well and scraping the sides of the bowl to ensure everything is well mixed.
Turn the mixer to a slow speed and add the vanilla extract.
Sift the flour, salt, bicarbonate and cinnamon in a separate bowl.
Add the oats and mix it all together.
Now add the dry ingredients to the butter and sugar mixture. Once this is fully mixed, add the raisins.
You will have a sticky dough. Weigh out balls of 50g each, by weighing them you will have the same size cookies. Roll them in your hands like small golf balls.
Place them on the trays and press down with your two middle fingers to secure them to the paper. This also helps in creating the round shape. Leave space as they do spread.
Bake in the oven for 12 minutes. When you remove them forms he oven leave them for 3 minutes on the trays before putting them on a rack too cool.