This is a beef burger seasoned with smoked paprika and grated onion, topped with a quick-pickled gazpacho slaw and a smoked paprika aioli. The honest reason to make it: the slaw and aioli both keep well in the fridge, so if you make them on Sunday you can throw together a genuinely interesting burger any night of the week without much effort.
What makes this version work
Two things matter here. First, grating the onion directly into the beef rather than chopping it means the moisture and flavor distribute evenly through every patty — no dry spots, no raw onion chunks. Second, the gazpacho slaw needs at least 30 minutes in its vinegar-and-olive-oil dressing before it goes on the burger. That rest time is what takes it from a pile of raw vegetables to something that actually tastes cohesive and bright. Rush either of these steps and the burger is fine but unremarkable. Give them the time they need and the whole thing clicks.
If something goes sideways
- Slaw is watery by the time you build the burger: Salt draws liquid out of cucumber fast. If you salted the slaw and let it sit too long, drain it in a fine-mesh strainer and press gently before piling it on the bun. This is especially worth doing if you prepped the slaw the day before.
- Patties are falling apart on the grill: Ground beef with too little fat content (anything leaner than 80/20) won’t hold together well, especially with the added moisture from grated onion. Make sure you’re using 80/20 and that the patties are well-chilled before they hit the grill.
- Aioli is too thick to spread: Whisk in cold water a teaspoon at a time until it loosens. Don’t add more lemon juice to thin it — you’ll throw off the flavor balance.
- Smoked paprika tastes bitter: Old smoked paprika loses its sweetness and turns harsh. If yours has been in the spice drawer for more than a year, replace it. The aioli and the patties both depend on it tasting mellow and smoky, not acrid.
- Brioche bun is soggy before you finish eating: Spread the aioli on both cut sides of the toasted bun — it acts as a moisture barrier. Putting the slaw directly on the bottom bun without any aioli underneath is what causes the sog.
About the ingredients
- Smoked paprika (pimentón): Use Spanish smoked paprika specifically — regular sweet paprika or Hungarian paprika won’t give you the same depth. Most grocery stores carry it in the spice aisle. Sweet smoked paprika works here; hot smoked paprika is fine if you want a little kick.
- Wine vinegar in the slaw: Red wine vinegar is the right call. White wine vinegar works in a pinch. Avoid balsamic — it’s too sweet and will muddy the color.
- Brioche buns: Skip the egg in the patty mix — it makes the patty mushy — but don’t skip toasting the brioche. It’s soft enough that an untoasted bun will collapse under the slaw.
- Portobello or chickpea patty swap: Either works as a vegetarian sub. If using portobello, brush it with the same smoked paprika and olive oil mix before grilling. Cook chickpea patties to an internal temperature of at least 165°F (74°C) if they contain egg, or until firm and heated through if egg-free.
Storage and reheating
The slaw keeps in an airtight container in the fridge for up to 3 days — it actually improves on day two. The smoked paprika aioli keeps refrigerated for up to 5 days; press plastic wrap directly onto the surface to prevent a skin from forming. Raw seasoned patties can be stacked with parchment between them and refrigerated for up to 2 days, or frozen for up to 2 months — thaw overnight in the fridge before cooking. Cooked patties reheat best in a covered skillet over medium-low heat with a splash of water; microwave reheating works but dries them out. Always bring cooked beef patties to an internal temperature of 160°F (71°C) when reheating. Assemble only what you’re eating right now — built burgers do not store well.
Spanish Gazpacho-Inspired Burger
Ingredients
For the Burger Patties:
- 1.25 lb ground beef (80/20) preferably grass-fed
- ¼ cup yellow onion, finely grated to keep patties moist
- 1 tsp smoked paprika adds a subtle smoky depth
- ½ tsp sea salt
- ¼ tsp freshly ground black pepper
For the Gazpacho Slaw:
- ½ cup cucumber, julienned peeled, seeds removed
- ½ cup red bell pepper, thinly sliced
- ¼ cup red onion, thinly sliced use a mandoline for thin, even slices
- 1 clove garlic, minced
- 2 tbsp red wine vinegar Spanish preferred
- 1 tbsp extra virgin olive oil high-quality, fruity variety
- ⅛ tsp salt
For Assembly:
- 4 pieces brioche burger buns toasted lightly on grill
- 4 leaves lettuce preferably butterhead or green leaf
- 4 slices ripe tomato heirloom if in season
- 4 tbsp smoked paprika aioli store-bought or homemade
Instructions
- Prepare Gazpacho Slaw: In a medium bowl, combine cucumber, red bell pepper, red onion, and garlic. Drizzle with red wine vinegar and olive oil. Season with salt. Toss to coat and refrigerate for 20–30 minutes to allow flavors to meld.
- Make the Burger Patties: In a large bowl, mix ground beef with grated onion, smoked paprika, sea salt, and black pepper. Form into 4 equal patties roughly 3/4 inch thick, making a shallow indent in the center of each for even cooking.
- Grill the Patties: Heat a grill or skillet over medium-high heat (around 400°F / 200°C). Grill patties for 5–6 minutes per side for medium doneness, flipping once. Let rest 3 minutes before building burgers.
- Toast the Buns: While patties rest, toast brioche buns face-down on the grill for 1–2 minutes until golden with slight crisp edges.
- Assemble the Burgers: Spread 1 tablespoon of smoked paprika aioli on the bottom toasted bun. Place lettuce leaf, followed by burger patty, tomato slice, a generous scoop of gazpacho slaw, and the top bun. Serve immediately.
Notes
- For a vegetarian option, substitute the beef patties with grilled portobello mushrooms or chickpea patties seasoned with paprika and garlic.
- Make the aioli by combining mayonnaise, a touch of lemon juice, garlic, and Spanish smoked paprika to create a balanced tangy profile.
- Marinate the slaw for longer—up to 4 hours—for deeper flavor development.
Nutrition
Frequently asked questions
Can I make the slaw the night before?
Yes, and it’s actually better the next day. Make it, cover it, and refrigerate it overnight — the vegetables soften slightly and the vinegar flavor mellows into something more balanced. Drain any excess liquid before serving.
What internal temperature should the beef patties reach?
Cook ground beef patties to 160°F (71°C) internal temperature. Use an instant-read thermometer inserted sideways into the center of the patty for an accurate reading — don’t rely on color alone.
Can I cook the patties on a stovetop instead of a grill?
A cast-iron skillet works well and gives you a good crust. Get the pan hot before the patties go in, and don’t press them down — you’ll push out the juices the grated onion helped retain.
Can I prep multiple patties at once and freeze them?
Yes. Form the patties, separate them with parchment paper, and freeze in a zip-top bag for up to 2 months. Thaw in the refrigerator overnight before cooking — don’t cook from frozen or the outside will overcook before the center hits 160°F.
My aioli broke and looks greasy — can I fix it?
Start with a fresh egg yolk in a clean bowl and very slowly whisk the broken aioli into it, a few drops at a time. This re-emulsifies it in most cases. If you’re using store-bought mayo as the base, it’s less likely to break — just whisk in the paprika and lemon juice and it should stay stable.
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