I’ve finally settled on calling the doughnut entremet-things doughnut creams, mostly because it’s a lot easier to say. For this recipe, I opted for banana and salted caramel, nuanced with brown butter and walnuts. The layers for this cake are a brown butter-banana-nut cake, salted caramel bavarian cream, caramelized mirror glaze, salted caramel, and bruleed…