Flax meal usually acts as an egg replacer, so if you want to incorporate that into the batter we recommend you first read our blog about making a homemade egg replacer using flax. Replacing just 1 of the eggs in the batter might be a good place to start. If you want to incorporate hazelnut flour into these muffins, you could use 1/4 cup in the topping and another 1/4 in the batter. You'll want to reduce the all-purpose (or white whole wheat flour) by the same amount. Thanks for joining us in September's Bakealong challenge! Kye@KAF

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