gluten-free buttery brownies with walnuts

List of allergens: 1. Cereals containing gluten (wheat, rye, barley, oats and their hybrid varieties); 2. crustaceans; 3. eggs; 4. fish; 5. peanuts; 6. soybeans; 7. milk (including lactose); 8. nuts (almonds, hazelnuts, walnuts, cashews, pecans, Brazil nuts, pistachios, macadamia and Queensland nuts); 9. celery; 10. mustard; 11. sesame seeds; 12. sulphur dioxide and sulphites (above 10 mg/kg or 10 mg/l); 13. lupin; 14. molluscs. List of allergens: 1. Cereals containing gluten (wheat, rye, barley, oats and their hybrid varieties); 2. crustaceans; 3. eggs; 4. fish; 5. peanuts; 6. soybeans; 7. milk (including lactose); 8. nuts (almonds, hazelnuts, walnuts, cashews, pecans, Brazil nuts, pistachios, macadamia and Queensland nuts); 9. celery; 10. mustard; 11. sesame seeds; 12. sulphur dioxide and sulphites (above 10 mg/kg or 10 mg/l); 13. lupin; 14. molluscs.