Making Sous Vide Custard
Drawing on some inspiration in this post on creme brulee at SVKitchen, I decided to try a custard. Since I bought entirely too many blueberries this season, and the last of the bunch is rapidly aging in my fridge as I try to use them up before they go bad (I’ve already frozen as many as my freezer can handle), I decided to top this batch with a blueberry gel.
The SVKitchen folks used a set of fiberglass rods to elevate the tray to allow the custard cups to sit near the top of the oven while maintaining the proper water level, but it turns out that one of my cooking racks fit perfectly underneath the included one:
The normal way to make custard is to cook the cream and sugar at a moderate heat together to mix them, and then add beaten eggs and cook in a water bath. I thought the SVS could make this easier, so I just mixed all of the ingredients together in the mixer until they were combined but not frothy (do the last little bit by hand for more control). I doubled Bittman’s standard custard recipe (I’ve pretty much given up on the book and use his $2 searchable iPhone app all the time) and substituted vanilla for the nutmeg and cinnamon, since I’m allergic to nutmeg and I like vanilla. This doubled recipe calls for 4 cups of cream, 1 cup of sugar, 4 whole eggs, 4 egg yolks, and a pinch of salt plus flavorings:
This recipe made enough to fill 8 8-oz ramekins all the way to the top, plus a little left over. I filled the cups through a mesh strainer to get out any last unmixed bits, covered them with plastic wrap, and cooked them (covered) in the SVS at 175F for an hour:
When they were almost done, I cooked about two cups of blueberries over moderate heat with a tablespoon or so of sugar and bloomed a packet of gelatin in a bowl of water. When the blueberries were cooked through and starting to burst (about 5-7 minutes), I stirred in the gelatin and let them cook for a few more minutes. Then I drizzled the hot syrup over the top of the cups:
After chilling in the fridge for about 4 hours, they were absolutely fantastic. The texture is flawless, the flavors are great, they’re perfectly cooked all the way through, and the whole thing only took about 15-20 minutes of actual effort.
Lovely.
