I make these a lot, I play with the recipe and add such morsels as dried apricots, raisins, dried apple, I sometimes put only white chocolate chips, sometimes a mix of white and dark chocolate chips. These are old fashioned measurements you can probably figure out the metric measurements or just basically make them up as you go along.
I often make these to take somewhere as a plate and always double the recipe if I’m doing that.
1/2 a cup of butter, 1/2 a cup of castor sugar (ordinary is also fine), 1/2 a cup brown sugar, 1 egg, 1/2 tsp vanilla (I always use more), 1 cup plain flour, 1 cup rolled oats (be generous), 1/4 tsp salt, 1/2 tsp baking powder, 1/2 tsp baking soda, 1 cup chocolate chips. Optional is 1/2 to 1 cup rice bubbles – I like the crunch and the extra texture and nuts are good too.
In a large bowl, cream butter and sugar, add egg and vanilla and beat well. In a separate bowl mix together the flour, rolled oats, salt, baking powder, soda and chocolate chips. Add these to the butter mixture. Place in balls (wetish hands are best for rolling them cos they are mightily sticky) on a baking tray leaving plenty of room for spreading. Bake at 180 degrees C for about 8 minutes or until golden and let them cool a little on the tray so that they aren’t so bendy. Cool completely on a wire rack.
Eat rather a lot of them with a great coffee or a cup of gumboot tea.