Pork St Louis Spare Ribs Recipe Instant Pot: Pressure-Cooked Fall-Off-The-Bone Tender

Achieving fall-off-the-bone tender pork spare ribs doesn’t require hours by the smoker. This method delivers professional results with a fraction of the time and effort.

The Instant Pot transforms tough cuts into perfectly cooked ribs by breaking down collagen under pressure. A quick sear before cooking adds depth, while the pressure cooking locks in moisture and flavor.

What emerges is meat so tender it nearly dissolves with each bite, with a sauce that’s rich and deeply flavorful. The ribs maintain their shape while offering that coveted melt-in-your-mouth quality.

This technique proves that restaurant-quality ribs are possible on a weeknight. The process is straightforward yet yields impressive, consistent results every time.

Ingredients for Pork St Louis Spare Ribs Recipe Instant Pot

These select ingredients transform tough ribs into a tender, restaurant-quality dish with minimal effort.

The ribs are the foundation—St. Louis-style spare ribs offer the ideal fat-to-meat ratio for pressure cooking. Source them from a trusted butcher or Costco for consistent quality. Look for ribs with even marbling and a bright pink hue, avoiding any with a sour odor. Diamond Crystal kosher salt is optimal for seasoning due to its coarse texture and clean flavor.

Swapping paprika varieties alters the flavor profile: smoked adds depth, sweet brings mildness. No Worcestershire? Soy sauce with a dash of lemon juice mimics the umami. Fresh garlic is non-negotiable for the sauce—pre-minced lacks punch. The apple cider vinegar can be replaced with white vinegar in a pinch, though the fruitiness is lost.

Rubbed ribs can rest overnight for deeper flavor penetration. Cooked ribs keep in the fridge for 3-4 days or freeze for 3 months. Reheat in a covered dish with a splash of broth to maintain moisture.

Step-by-Step Instructions for Pork St Louis Spare Ribs Instant Pot

Master the pressure cooker technique for ribs that are tender yet retain their structure perfectly.

Step 1: Prepare and Season the Ribs

Pat the 3 lb Pork St. Louis Spare Ribs completely dry with paper towels. This critical step ensures the dry rub adheres properly and promotes browning. Remove the membrane from the bone side by sliding your fingers under it and pulling it off in one piece—this prevents chewy texture in the finished dish.

In a small bowl, combine the 1.5 tbsp Kosher Salt, 1 tbsp Freshly Ground Black Pepper, 1 tbsp Paprika, 1 tbsp Garlic Powder, 1 tbsp Onion Powder, and 0.5 cup Light Brown Sugar. Rub this mixture evenly over all surfaces of the ribs, pressing gently to ensure adhesion. Let them sit at room temperature for 15-20 minutes while you prepare the other ingredients.

Step 2: Sear the Ribs for Depth of Flavor

Set your Instant Pot to the Sauté function on Normal heat. Add the 2 tbsp Olive Oil and allow it to heat until shimmering. Working in batches if necessary to avoid crowding, sear the ribs for 3-4 minutes per side until deeply browned. The sugar in the rub will caramelize slightly, creating a rich crust.

Don’t rush this step—proper searing develops the Maillard reaction that gives the ribs their complex flavor. You’ll notice the kitchen filling with a rich, smoky aroma when it’s done correctly. Remove the ribs and set aside.

Step 3: Build the Cooking Liquid and Pressure Cook

With the Instant Pot still on Sauté, add the finely diced 1 whole Yellow Onion and cook for 3-4 minutes until softened and just beginning to brown. Add the minced 4 cloves Fresh Garlic Cloves and cook for 30 seconds until fragrant. Stir in the 2 tbsp Tomato Paste, 1 tbsp Worcestershire Sauce, and 0.25 cup Apple Cider Vinegar, scraping up any browned bits from the bottom.

Pour in the 1 cup Low-Sodium Chicken Broth and add the 2 whole Bay Leaves. Return the ribs to the pot, standing them on their edges around the perimeter. Secure the lid, set the valve to Sealing, and cook on High Pressure for 25 minutes. The ribs will emerge from this process remarkably tender while maintaining their shape.

Step 4: Natural Release and Finishing

Allow the pressure to release naturally for 15 minutes, then quick-release any remaining pressure. This gradual release prevents the ribs from becoming tough. Carefully remove the ribs to a serving platter—they should be fork-tender but not falling apart.

For a glossy finish, you can optionally reduce the cooking liquid using the Sauté function for 5-7 minutes until it thickens slightly, then spoon it over the ribs. The sauce will have absorbed all the rich flavors from the cooking process, creating a perfect complement to the tender meat.

Dietary Considerations for This Recipe

Gluten-Free Friendly

This recipe is naturally gluten-free as written, with no wheat-based thickeners or sauces. The Worcestershire sauce is the only potential concern—verify your brand is gluten-free, or substitute with coconut aminos for a safe alternative. 💪

Keto Adaptations

To make this keto-friendly, replace the 0.5 cup Light Brown Sugar in the rub with ½ cup erythritol or allulose. These sugar alcohols caramelize similarly and provide the same texture. The rest of the recipe remains unchanged.

Dairy-Free Naturally

This dish contains no dairy ingredients, making it safe for those with lactose intolerance or dairy allergies. The chicken broth and all other components are inherently dairy-free, so no substitutions are needed.

Low-Sodium Options

Reduce the 1.5 tbsp Kosher Salt to 1 tsp and use no-salt-added chicken broth. Boost flavor with extra garlic powder and onion powder to compensate. Taste before serving and adjust with a pinch of salt if needed. ⚡

Paleo-Friendly Tweaks

For paleo compliance, replace the brown sugar with ½ cup coconut sugar and ensure your Worcestershire sauce is paleo-approved (no refined sugar or additives). The rest of the ingredients align with paleo guidelines.

Allergen Awareness

The primary allergens to watch are in the Worcestershire sauce (may contain fish or soy) and chicken broth (check for soy or egg additives). Always verify labels to match your specific allergen needs.

Frequently Asked Questions