Hazelnut, orange and chocolate biscuits

Wasn't sure whether to post this, since I'm now writing a cook book (of sorts...) and wondered whether I should keep the new recipes to myself....but this is too yummy not to share, and quite similar to my previous biscuit recipes so here it is:

70g melted butter
mix in: 30-50g sugar (to taste)
100g ground almonds
1 egg yolk
15g chopped roasted hazelnuts
1 tsp orange essence
25g dark chocolate chips
1/2 tsp gluten-free baking powder

mix it all together - it should form one big lump or ball in your bowl once thoroughly mixed. Divide into 16 equal sized bits, roll into balls and place on a greased and lined baking tray. I don't squish these at all, just leave them as balls:

Bake in a prewarmed oven at 160C (325F/GM3) for 20 minutes. Allow to cool on the tray before removing. Keep these in an airtight container and they keep for a couple of days then go soggy (they're still nice, but not as crunchy) ... saying that, they don't last that long in this house anyway....