Slow-Cooker Shredded Beef Tacos Ingredients 2 Tbsp. extra virgin olive oil 2 pounds beef (I used a boneless chuck roast) 2 tsp. chili powder 1 tsp. cumin 1/2 tsp. smoked paprika 1 cup beef stock 2 Tbsp. tomato paste 1 chipotle pepper in adobo sauce, minced (I love spice and used two!) 1/2 large