Slow Cooker Beef Barbacoa

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"Beef barbacoa (barbacoa de res) that’s juicy, meltingly tender, and seasoned with flavorful chilies and spices. The key to this Mexican staple is cooking it low and slow for meat that falls right apart. And once it does, it makes for the ultimate barbacoa tacos, bowls, and so much more!"
-- @downshiftology