You can use melted butter instead of oil, but your cake may be a little denser.

Adam Roberts is an original: smart, funny, talented, endlessly inquisitive, an A student and, happily for us, an A+ teacher. Everyone from beginner cooks to sure hands will learn something new on each page. And even if, like Adam's mom's, your stove stores shoes and handbags, you'll still be charmed by Secrets-it's a great read.

Whenever you brown butter, some of it is lost - water evaporates, milk solids fall to the bottom of the pan, that kind of thing. It's possible that in browning the butter you ended up making the dough with too little butter.

I use color as my chief guide. But I always squeeze an avocado - you want the fruit to feel close to the skin. If you can feel a separation, the avocado is past its prime. The avocado should have a little give, but not much.

Meyer lemons are a splurge, but they're so wonderful. You could make a Meyer lemon curd or a jam. You could make a salad with slices of Meyer lemon. You could make a Meyer lemon tart and top the tart with candied slices of the lemons. You could use the lemons in a salsa to go over grilled fish or in a ceviche.

I often say that eggs and sugar should be beaten until they thicken and pale and sometimes, when there are lots of yolks, that's lemon colored.

Sometimes I think there are devils at work in the kitchen - recipes that are always perfect sometimes come out less than perfect and I can't figure out why.