This is a grilled chicken breast burger marinated in piri piri sauce and olive oil, topped with greens, tomato, red onion, and a lemon mayo. It comes together in 45 minutes and the ingredient list is short enough that you probably have most of it already. If you like heat and want something faster than a takeout order, this is a solid weeknight option.
The short version of why this works
Two things make this burger worth the effort. First, the marinade — even a bare 30 minutes in olive oil and piri piri sauce gets the chicken genuinely flavorful all the way through, not just on the surface. The oil carries the heat and aromatics into the meat rather than letting them sit on top and burn off. Second, the lemon juice in the mayo does real work: it cuts through the richness of the oil and softens the sharpest edge of the chili heat, so the burger doesn’t just taste hot — it tastes balanced. Neither step is complicated, but skipping either one will cost you.
Storage and reheating
Cooked chicken fillets keep in an airtight container in the fridge for up to 3 days. Store the buns, toppings, and mayo separately — assembling ahead turns the bun soggy fast. To reheat, a dry skillet over medium heat for 2–3 minutes per side keeps the outside from going rubbery; the microwave works in a pinch but tends to toughen the meat. For freezing, wrap individual cooked fillets tightly in plastic wrap, then foil, and freeze for up to 2 months. Thaw overnight in the fridge before reheating — don’t rush it on the counter. The raw marinated chicken can also be frozen before cooking: seal it in the marinade in a zip-lock bag and freeze for up to 1 month. Cook from fully thawed and always check that the internal temperature hits 165°F (74°C) before serving.
Mistakes to avoid
- Using cold chicken straight from the fridge: Cold fillets hit a hot pan unevenly — the outside chars before the center cooks through. Pull the chicken out 15 minutes before grilling so it approaches room temperature.
- Skipping the pat-dry before grilling: Excess marinade on the surface steams instead of sears, and you lose that lightly charred crust. Shake off the bulk of the marinade before the chicken goes on the heat.
- Cutting into the chicken to check doneness: Every cut lets juice escape. Use an instant-read thermometer instead — 165°F (74°C) at the thickest point is your target, and it takes the guesswork out completely.
- Buying an expensive branded piri piri sauce when a cheaper one works fine: The marinade is diluted with olive oil and cooked at high heat, so subtle flavor differences between brands mostly disappear. Save the good stuff for drizzling at the table if you want — skip the egg in the mix — it makes the patty mushy — doesn’t apply here, but don’t overspend on sauce for the marinade itself.
- Overloading the bun with toppings before the chicken is rested: Give the grilled fillet 3–5 minutes off the heat before assembling. It finishes cooking, the juices redistribute, and you won’t end up with a wet bun from the first bite.
Portuguese Piri Piri Chicken Burger
Ingredients
Marinated Chicken
- 4 pieces chicken breast fillets organic, skinless
- 2 tablespoons olive oil
- 4 tablespoons piri piri sauce preferably homemade
Burger Assembly
- 4 medium burger buns lightly toasted
- 1 cup mixed greens fresh
- 1 medium tomato large, sliced
- ½ cup red onion thinly sliced
- ¼ cup mayonnaise optional, for spreading
- 1 teaspoon lemon juice freshly squeezed
Instructions
- In a shallow dish, combine chicken breast fillets with olive oil and piri piri sauce. Massage the marinade into the meat, cover, and let it marinate in the refrigerator for at least 30 minutes.
- Preheat a grill or frying pan over medium-high heat (approximately 200°C/392°F). Grill chicken fillets for about 7 minutes on each side until fully cooked and lightly charred.
- While the chicken is grilling, prepare the burger buns with a spread of mayonnaise mixed with lemon juice for a tangy kick on each top bun.
- Assemble each burger by placing a grilled chicken fillet on the bottom half of the bun. Top with mixed greens, a slice of tomato, and red onion rings. Finally, crown each with the top bun.
Notes
Nutrition
Frequently asked questions
Can I use chicken thighs instead of chicken breast fillets?
Yes, boneless skinless thighs work well here and are often cheaper. They have more fat than breasts, so they stay juicy even if you cook them a minute or two longer — just make sure the internal temperature still reaches 165°F (74°C).
What can I use if I don’t have piri piri sauce?
A mix of hot sauce (like Tabasco or Frank’s), a little smoked paprika, a splash of white wine vinegar, and minced garlic gets you close enough. Start with 3 tablespoons of hot sauce, half a teaspoon of paprika, and a teaspoon of vinegar, then adjust heat to taste.
Can I cook these in a regular frying pan instead of a grill?
A cast-iron or heavy stainless skillet over medium-high heat works well — you won’t get grill marks, but the crust and flavor are nearly identical. Make sure the pan is properly hot before the chicken goes in, or it will stick and steam rather than sear.
How do I tone down the heat for people who don’t like spicy food?
Cut the piri piri sauce to 2 tablespoons and increase the olive oil slightly to keep the marinade from drying out. A thicker spread of the lemon mayo on both bun halves — not just the top — also does a lot to dial back the perceived heat without changing the recipe significantly.
More burger recipes to try
- Korean Fried Chicken Burger
- Sweet Chili Chicken Burger
- Nashville Hot Chicken Perfected
- Wendy’s Spicy Chicken Copycat