Step 1In a large bowl, beat the eggs, then add the jalapeno, red onion, sourdough bread, mayonnaise, Old Bay, cilantro, parsley, mustard and panko. Gently fold in the crab until combined.
Step 2Form the mixture into 10 crab cakes. Heat a medium saute pan over medium-high heat. Melt a half-tablespoon each butter and olive oil in the pan, then fry the crab cakes, two at a time, until golden on each side, 2 to 3 minutes per side. Place the crab cakes on a parchment-lined baking sheet and continue to fry the remaining cakes, adding additional butter and oil as necessary.
Step 3When all the cakes are fried, place the sheet pan in the oven and bake the cakes at 350 degrees until set in the center and slightly firm to the touch, about 8 minutes. Serve immediately.