Mocha Hazelnut Macarons

The basic macaron recipe is relatively flavor neutral, making it a perfect vehicle for varying with the addition of any number of flavoring agents. Once you're comfortable making macarons, creating and experimenting with new flavors may become an obsession! However, remember this: Always use dry flavoring agents. Liquid flavors, beyond about a quarter teaspoon, are the enemy, as your goal is to produce as moisture-free a batter as possible, to prevent cracking.