Whisk first 5 ingredients in a small bowl to make spicy cream sauce; cover and keep in fridge until ready to serve.
Mix corn and next 10 ingredients in medium sized bowl to make relish; cover and keep in fridge until ready to serve. Wear rubber gloves when handling jalapeƱos or wash hands thoroughly afterwards to avoid skin irritation.
Mix crabmeat and next 6 ingredients in bowl until moist but shape-forming. Add more breadcrumbs if too wet, more mayo if too dry.
Shape into 4-5 patties. Let sit for a few minutes to set. If needed, keep in fridge until ready to cook; then let come to room temperature.
Swirl 3-4 tablespoons oil in non-stick pan over medium-high heat. Wait until shimmery anduse tonghs to add crab cakes to pan. Use splatter screen if needed.
When you see edges browning (2-3 minutes), carefully turn with tongs. Reduce heat to medium and continue cooking until done (2-3 minutes more). Remove from pan.
Serve over greens and black bean salsa. Drizzle with spicy cream sauce and enjoy!