Crispy crostini topped with whipped crab cream cheese, garlic shrimp, cherry tomato, and dill. Ready in 30 minutes and easy to make ahead for a party.
Someone always asks what’s in the piping bag. That’s how I know this shrimp and crab crostini is working before anyone’s even taken a bite. I started making it because I wanted a crab-forward appetizer I could pull together on a random Tuesday without a special trip for lump crab, and imitation crab sticks turned out to be the answer. Whipped into cream cheese with lemon and dill, nobody at the party has ever guessed.
The build is simple: whipped crab cream cheese piped onto crisp toasted baguette, topped with garlic-seared shrimp, a tuck of cherry tomato, and a sprig of dill. Nothing about it is hard. But the order you do things in, and a few small details most recipes skip, are the difference between this looking like it came from a caterer and looking like a Tuesday night snack.
I make it for holidays constantly, but it shows up just as often on a random Friday cheese-and-wine night, or as the one “fancy” thing at a potluck full of casseroles. What people don’t expect is that every part of it can be made ahead. Come party day, you’re just assembling, which means you actually get to be at your own party instead of stuck behind the counter.
Why You’ll Love This Recipe
- The whipped crab filling comes together in a food processor in under two minutes and can be made two days ahead.
- Every piece can be prepped early, so assembly on the day takes about ten minutes.
- It looks like a caterer made it, using ingredients you can grab at any regular grocery store.
- The mix of creamy, garlicky, and bright citrus flavors wins over people who usually skip seafood appetizers.
Ingredient Notes
Imitation crab sticks are the whole point here, not a shortcut. Whipped into cream cheese with lemon and dill, the flavor reads as crab, and it means you can make this any week without planning around fresh seafood. If you’d rather use lump crab meat, pat it very dry first so the filling doesn’t turn watery.
Cream cheese needs to be fully softened before it hits the food processor, or you’ll get lumps no amount of blending fixes. Pull it out at least an hour ahead.
Dijon mustard and lemon juice are small quantities doing real work. They cut the richness of the cream cheese and mayo so the filling doesn’t taste flat.
Smoked paprika on the shrimp adds warmth and color without making the whole dish taste smoky. Regular paprika works in a pinch.
French baguette or sourdough both toast up well. Sourdough gives a slightly more rustic, tangy base if that’s the direction you want.
How to Make Shrimp and Crab Crostini
Start with the bread since it needs to cool completely before anything gets piped on. Slice the baguette into rounds about half an inch thick, brush both sides lightly with olive oil, and bake at 400°F for eight to ten minutes, flipping once. You want deep golden edges and a crackly surface, not just a light tan. Cool completely on a wire rack. Pipe onto warm bread and the filling just slides right off.
While the bread cools, make the whipped crab cream cheese. Everything goes into the food processor at once: softened cream cheese, chopped imitation crab, mayonnaise, Dijon, lemon juice, garlic, fresh dill, black pepper, and a pinch of salt. Blend for a full minute or two, scraping the sides halfway through, until it’s completely smooth, almost like a mousse. Load it into a piping bag fitted with a large open-star tip and refrigerate while you handle the shrimp. Chilling it briefly actually makes it pipe cleaner.
For the shrimp, toss them right in a bowl with olive oil, minced garlic, smoked paprika, salt, and pepper. Get the skillet properly hot over medium-high before they go in. This matters more than people think. A hot pan sears the shrimp instead of steaming them, so they cook in just one to two minutes per side. Pull them the second they turn pink and opaque. Shrimp go from perfect to rubbery fast.
Now assemble. Pipe a generous ribbon of the whipped crab mixture along one side of each cooled crostini. Lay two shrimp slightly overlapping on top, tuck half a cherry tomato behind them cut-side out, nestle in a small dill sprig, and finish with a light grating of lemon zest right before serving. The zest goes on last since its aroma fades fast once it’s exposed to air.
Tips for Success
Toast the bread until it’s genuinely crisp all the way through, not just lightly golden. A crostini that’s only half-toasted goes soft under the filling within twenty minutes.
Chill the piping bag for at least fifteen minutes before assembling. Cold filling holds its shape on the crostini instead of slumping.
Cook the shrimp in batches if your skillet runs small. A crowded pan drops the temperature and steams the shrimp instead of searing them.
Variations and Substitutions
For a lighter version, swap the mayonnaise for Greek yogurt in the crab filling. It adds a pleasant tang and cuts some of the richness.
For heat, add a small pinch of cayenne or a few dashes of hot sauce to the shrimp marinade. It works well against the cool, creamy topping.
No fresh dill on hand? Chives or flat-leaf parsley both work, though the flavor shifts more toward a classic seafood-bar direction than the bright, herby one dill gives it.
Storage and Make-Ahead Instructions
The whipped crab cream cheese keeps well in an airtight container or sealed piping bag in the fridge for up to two days, which makes this one of the easier appetizers to get ahead of before a party. Toasted crostini can be made a day in advance and stored at room temperature in an airtight container, though they’re crispest the day they’re toasted. Shrimp can be cooked a few hours ahead and refrigerated, then brought to room temperature before assembling so the cold doesn’t dull the flavor. I don’t recommend assembling the full crostini more than thirty minutes before serving, since the bread starts to soften.
Frequently Asked Questions
Can I make this ahead of time for a party?
Yes, and I’d recommend it. Toast the bread a day ahead, make the whipped crab filling up to two days ahead, cook the shrimp a few hours before guests arrive, then assemble right before serving so the crostini stays crisp.
Can I use real lump crab meat instead of imitation crab?
Yes. Pat it dry with paper towels first, since lump crab holds more moisture than imitation crab and can thin out the whipped filling if it goes in wet.
Why is my whipped crab filling too soft to pipe?
Usually the cream cheese wasn’t fully softened before blending, or the mixture needs more time in the fridge. Fifteen minutes of chilling firms it up enough to pipe cleanly.
What can I serve alongside this crostini?
It fits naturally on a bigger appetizer spread. My Crab and Lemon Cream Crostini with Chive Oil makes a good companion since it plays with similar flavors from a different angle, and something bright like my Citrus Shrimp Crostini with Tropical Fruit Caviar rounds out the board without repeating the same profile twice.
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Whipped Crab and Garlic Shrimp Crostini
Ingredients
Method
- Preheat oven to 400°F. Arrange bread slices on a baking sheet and brush both sides lightly with olive oil.
- Bake for 8 to 10 minutes, flipping halfway, until golden brown and crisp. Cool completely on a wire rack.
- Add cream cheese, imitation crab, mayonnaise, Dijon, lemon juice, garlic, dill, black pepper, and a pinch of salt to a food processor.
- Blend for 1 to 2 minutes, scraping down the sides as needed, until smooth and fluffy.
- Transfer to a piping bag fitted with a large open-star tip. Refrigerate until ready to use.
- Toss shrimp with olive oil, minced garlic, smoked paprika, salt, and pepper in a bowl.
- Heat a large skillet over medium-high heat. Cook shrimp 1 to 2 minutes per side, until just pink and cooked through.
- Transfer shrimp to a plate to cool slightly.
- Pipe a ribbon of whipped crab cream cheese along one side of each crostini.
- Top with 2 overlapping shrimp, tuck half a cherry tomato behind them, add a dill sprig, and finish with lemon zest.
- Serve immediately.
Notes
- Crab filling keeps up to 2 days refrigerated.
- Crostini can be toasted a day ahead and stored at room temperature in an airtight container.
- Shrimp can be cooked a few hours ahead and refrigerated; bring to room temperature before assembling.
- Assemble no more than 30 minutes before serving to keep the crostini crisp.
