Place crabmeat in a large bowl. Add red pepper, green onion, and capers. Mix lightly.
In a separate small bowl, stir together mayonnaise and low fat sour cream.
Add egg and mayonnaise/sour cream to crab mixture. Stir lightly until just mixed.
Add ½ cup panko breadcrumbs. Stir lightly until mixture comes together. Add additional panko if your mixture seems too loose to form a crab cake.
To form the crab cakes:
Line a cookie sheet with wax paper or parchment paper.
Using a ½ cup ice cream scoop (If you have one. If not, use a ½ cup-measuring cup.), portion out approximately 12 crab cakes on the cookie sheet. Press down lightly to form a flattened crab cake, about ¾ inch thick. Cover crab cakes lightly with plastic wrap, and let set up in the refrigerator for about half an hour.
When ready to cook:
Add about 2 teaspoons butter and 1-teaspoon olive oil to a nonstick skillet. Preheat skillet over medium heat until butter starts to bubble.
Gently place as many crab cakes in the skillet as you can fit without crowding. Fry on one side for about 3 minutes, or until golden brown (yes, you can peek). When golden brown on one side, gently flip over and finish cooking until second side is brown.
Serve immediately or cover and place in a warm oven until ready to serve. Try not to let them sit too long though – not much more than 15 minutes.