This has happened to my last 2 batches. 2nd tray with both does this

by RepublicCute7683

4 Comments

  1. cixdyz650

    I’d usually say your oven has irregular heat distribution, but it’s odd considering your first batch was fine

  2. taxi212001

    Are you putting both trays in at the same time?

  3. Kiramaniac

    Do you turn your oven light on partway through batch 1 and leave it on? It can add enough heat to cause the macarons to rise unevenly.