Wash and dry mushrooms. Finely dice mushrooms or gently pulse in a food processor (takes around 10-15 seconds, don’t overpulse).
Add 1 Tbsp oil to a medium skillet set to medium-high heat. Add mushrooms, cooking 5-7 minutes, or until golden brown.
Remove from heat and let cool for 5 minutes. Transfer cooled mushrooms to medium bowl.
Add ground beef, salt and pepper and mix with hands until combined. Divide into 4 balls and shape into patties.
Using your thumb, make a deep indention (not a complete hole) into center of patty to help burger cook more evenly and the juices will pool to the middle.
Add 1 Tbsp avocado oil to skillet and cook patties on medium-high heat for about 5 minutes each side or until internal temperature reaches at least 160°.*
Choose your bun, slider, lettuce wrap or salad and enjoy with your favorite toppings! *