Line baking sheet with waxed paper.

In large bowl, whisk together mayonnaise, green onions, egg yolks, lemon juice, tarragon, cilantro, mustard, lemon peel and black pepper. Add crabmeat and 1 cup panko, breaking up crabmeat slightly. Let mix stand 10 minutes.

Form crab mixture into 16 2-inch patties, using about 1/4 cup for each cake. Place patties on baking sheet. Cover and chill at least 1 hour or up to 24 hours. Using remaining panko, lightly coat each crab cake.

Heat two heavy, large skillets over medium-high heat. In each skillet, melt 1 tablespoon butter with 2 tablespoons of olive oil. Add crab cakes to skillets and cook until golden on both sides (adding more butter and oil as needed), about 5 minutes total.

Transfer cakes to napkins to drain excess oil. Plate crab cakes with dollop of remoulade on top.