Making lunchbox cakes instead of buying them, homemade recipe

Im going to be making more lunchbox cakes etc instead of buying them! Ill chuck them in the oven on a Sun with the roast, to make the most of having the oven on. Im using my Bero book as I love the recipes, simple ingredients, no fuss, & usualy fairly quick.

Ive just made some cupcakes, white choc chip, dark choc chip, & a bakewell inspired batch too (for home). Ive got a couple written down for next wk, one is chocolate & pistachio marble cake, I really want to try it but my kids school is a nut free school due to allergies. 

Is there anything I can replace the pistachios with?! Or am I best just making it for home? X.

Making lunchbox cakes