Making BBQ beef sliders with pickles is a straightforward process that involves preparation, cooking, and assembling. Follow these steps to create the ultimate sliders:

Step 1: Prepare the Beef

1. Season the Beef: Rub the beef chuck roast with salt, pepper, paprika, onion powder, and garlic powder.
2. Brown the Beef: In a large skillet, heat olive oil over medium-high heat. Add the beef and sear it on all sides until browned.
3. Slow Cook the Beef: Transfer the beef to a slow cooker. Add sliced onions, minced garlic, beef broth, Worcestershire sauce, and BBQ sauce. Cover and cook on low for 8 hours or on high for 4 hours, until the beef is tender and easily shredded.

Step 2: Shred the Beef

4. Shred the Beef: Once cooked, remove the beef from the slow cooker and shred it using two forks.
5. Thicken the Sauce: Optionally, transfer the cooking liquid to a saucepan. Bring to a simmer and reduce until slightly thickened. Return the shredded beef to the sauce.

Step 3: Assemble the Sliders

6. Prepare the Buns: Preheat your oven to 350°F (175°C). Place the slider buns on a baking sheet and brush the tops with melted butter.
7. Layer the Ingredients: On the bottom half of each bun, place a generous portion of shredded BBQ beef. Top with a pickle slice.
8. Cover and Warm: Add the top half of the bun and lightly press down. Cover the sliders with aluminum foil and bake for 10 minutes to warm through.