275g/9.75oz gluten-free biscuit and baking mix
1 tsp. baking powder/bicarbonate of soda
1/2 tsp. xanthan gum
¼ tsp. salt
1 tsp. vanilla extract
150g/5.25oz banana, mashed
50g/2oz coconut sugar
100g/3.5oz peanut butter
1 egg
80ml/2.75fl oz milk
115g/4oz raspberry jam – optional
2 tbsp. milk, for brushing
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