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1
With a rack bone side up, and starting at one end, slip a knife tip under the translucent membrane, loosening it from the bone. Once you have lifted enough to get a good grip, grasp the membrane with a paper towel and peel it off the rack (or ask your butcher to do this). Repeat with the remaining rack(s). Cut the rack(s) in half crosswise.
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2
Stack the ribs in the Instant Pot. Pour in the apple juice and vinegar. Secure the lid and move the Pressure Release to Sealing. Select the Meat/Stew setting and set the cooking time for 20 minutes at high pressure. (For meat-falling-off-the-bone ribs, set the cooking time for 25 minutes.)
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3
Let the pressure release naturally for 15 minutes. While the pressure is releasing, preheat the oven to 400u00b0 F and line a sheet pan with aluminum foil or a silicone baking mat.
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4
When 15 minutes have passed, move the Pressure Release to Venting to release any remaining steam. Open the pot and, using a pair of tongs, transfer the ribs to the prepared sheet pan. Discard the cooking liquid.
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5
Brush the ribs on both sides with the barbecue sauce, then bake for about 10 minutes, until the sauce is a caramelized and browned. Remove from the oven, cut the ribs apart, and serve.
