When you want a showstopping vegetarian main dish that offers meaty texture and complex flavor, Roasted Cauliflower Steaks with Romesco Sauce are an unbeatable choice. Thicker center-cut slices of cauliflower are roasted at high heat until their edges caramelize and turn golden brown, then served over a thick, silky Spanish Romesco sauce made from roasted red peppers, toasted nuts, garlic, olive oil, and smoked paprika.
The secret to keeping cauliflower steaks intact and getting a deep caramelization is Keeping the Core Intact When Slicing and Searing in a Hot Pan Before Oven-Roasting. Leaving the central core intact holds the florets together into clean “steaks,” while starting them in a hot skillet creates a golden-brown crust before baking them until tender.
Why You’ll Love This Dish
- Meaty & Satisfying Texture: Thick-cut cauliflower develops crisp, caramelized edges while remaining tender in the center.
- Bold Spanish Flavor Profile: Romesco sauce delivers a smoky, nutty, sweet, and tangy punch that elevates simple vegetables.
- 100% Plant-Based & Gluten-Free: Packed with fiber, healthy fats, and antioxidants.
- Make-Ahead Sauce: Romesco sauce can be whipped up days in advance and kept in the fridge for quick assembly.
Key Ingredients Overview
- Whole Head of Cauliflower: Choose a large, dense head so you get 2 to 3 solid center-cut steaks (reserve outer florets for roasting separately).
- Roasted Red Peppers: Jarred roasted red bell peppers provide a sweet, smoky base for the sauce.
- Toasted Almonds or Hazelnuts: Provides thickness, body, and a rich nutty backbone to the Romesco.
- Smoked Paprika (Pimentón) & Sherry Vinegar: Essential Spanish pantry staples that give the sauce its iconic smoky tang.
- Extra Virgin Olive Oil & Garlic: Emulsifies the sauce into a smooth, velvety spread.
Step-by-Step Instructions
1.The Smoky Romesco Blend:10 min.
In a food processor or blender, combine 1 jar (12 oz / 340g) drained roasted red peppers, ½ cup toasted almonds (or almonds and hazelnuts), 1 minced garlic clove, 1 tablespoon tomato paste, 2 tablespoons sherry vinegar (or red wine vinegar), 1 teaspoon smoked paprika, ½ teaspoon salt, and ¼ teaspoon cayenne. Pulse until combined, then slowly drizzle in ⅓ cup extra virgin olive oil while blending until a thick, textured sauce forms. Taste and adjust seasoning.
2.The Core-Intact Steak Slice:5 min.
Preheat your oven to $200^\circ\text{C}$ ($400^\circ\text{F}$). Trim the outer leaves and excess stem base from a large head of cauliflower, keeping the core intact. Place the cauliflower stem-down on a cutting board. Cut two to three 1-inch-thick vertical “steaks” through the center of the head. (Reserve loose outer florets for another use or roast alongside on the pan!).
3.The High-Heat Sear:5 min.
Generously brush both sides of each cauliflower steak with 2 tablespoons of olive oil, and season with ½ teaspoon ground cumin, ½ teaspoon garlic powder, salt, and black pepper. Heat 1 tablespoon olive oil in a large oven-safe skillet (like cast iron) over medium-high heat. Add the cauliflower steaks and sear undisturbed for 3 to 4 minutes until deep golden brown on the bottom.
4.The Golden Oven Roast:15 min.
Carefully flip the cauliflower steaks over using a wide spatula. Transfer the skillet directly to the preheated oven (or transfer steaks to a baking sheet) and roast at $200^\circ\text{C}$ ($400^\circ\text{F}$) for 15 to 18 minutes, until the cauliflower is fork-tender and the edges are caramelized.
5.The Plating & Garnish:2 min.
Spoon a generous pool of the Romesco sauce onto the center of each serving plate. Lay a warm roasted cauliflower steak on top of the sauce. Garnish with chopped toasted almonds, fresh parsley, and a drizzle of extra virgin olive oil!
Expert Tips for Success
- Save the Core: The central core is the anchor holding your cauliflower steak together! Only trim the very bottom dirty tip of the stem—leaving the core intact prevents the florets from falling apart into small pieces.
- Toast Your Nuts: Toasting raw almonds or hazelnuts in a dry pan for 5 minutes before blending into the Romesco sauce releases natural oils and dramatically improves the flavor of the sauce.
- Repurpose Excess Romesco: Extra Romesco sauce stores well in an airtight jar in the fridge for up to a week. Use it as a spread on sandwiches, over grilled vegetables, or tossed with pasta!
The Recipe Card
- Prep Time: 15 mins
- Cook Time: 20 mins
- Total Time: 35 mins
- Yield: 2 to 3 Servings (Main)
Ingredients:
- The Cauliflower Steaks: 1 Large Head of Cauliflower, 3 tbsp Olive Oil (divided), ½ tsp Ground Cumin, ½ tsp Garlic Powder, Salt & Black Pepper to taste.
- The Romesco Sauce: 1 jar (12 oz) Roasted Red Peppers (drained), ½ cup Toasted Almonds, 1 Garlic Clove, 1 tbsp Tomato Paste, 2 tbsp Sherry Vinegar, 1 tsp Smoked Paprika, ⅓ cup Extra Virgin Olive Oil, ½ tsp Salt, ¼ tsp Cayenne Pepper.
- The Garnish: 2 tbsp Chopped Toasted Almonds, Fresh Flat-Leaf Parsley (chopped).
Instructions:
Blend roasted red peppers, almonds, garlic, tomato paste, sherry vinegar, smoked paprika, salt, and cayenne in a food processor; stream in ⅓ cup olive oil until thick and smooth. Cut cauliflower into 1-inch thick steaks through the core. Brush steaks with olive oil and season with cumin, garlic powder, salt, and pepper. Sear in a hot skillet for 3–4 minutes until golden brown, flip, and roast in the oven at $200^\circ\text{C}$ ($400^\circ\text{F}$) for 15–18 minutes until tender. Spread Romesco sauce on plates, top with roasted steaks, and garnish with almonds and fresh parsley.
