Directions
Layer the sliced onions evenly over the bottom of a 5- to 7-quart slow cooker. This onion bed keeps the brisket lifted slightly and allows the onions to soften and caramelize in the cooking juices.
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Sprinkle 1 packet of the dry onion soup mix over the onions in the slow cooker. This starts building the base flavor for the gravy.Pat the brisket dry with paper towels and place it fat-side up on top of the onions. Keeping the fat cap on top helps baste the meat as it cooks, contributing to that melt-in-your-mouth texture.