Place mushrooms in a food processor and process until mushrooms resemble ground beef.
Heat pan over medium heat and saute mushrooms for about five minutes until moisture is reduced by half. Remove from heat and let cool.
In a medium bowl, mash beans with a fork.
Add mushrooms, Worcestershire sauce, chili powder, salt, pepper and beef. Mix thoroughly.
Portion into four equal-sized patties.
Cook burger patty on a grill until internal temperature reaches 155 F. Make sure to not flip the patty too many times, which could break up the burger.
Combine mayonnaise with your favorite sriracha. Adjust sriracha amount based on your taste preferences.
Serve burger with favorite toppings on a whole wheat bun.