In a bowl, mash first amount of avocado and OLD BAY Hot Sauce until smooth.
Fold in cilantro, onions, and second amount of avocado. Cover and refrigerate until service.
Service
Set flattop to 375°F. For each burger, place 1 tablespoon butter on flattop and lay one patty overtop. Season with 1/4 teaspoon OLD BAY Seasoning. When ready, flip burger and season with additional 1/4 teaspoon OLD BAY Seasoning. Top with 1 slice pepper jack cheese and cook to desired doneness.
While burger is cooking, melt 1 tablespoon butter on flattop. Cook one egg in butter until the egg whites are set with the yolk still soft and liquid. Season with 1/4 teaspoon OLD BAY Seasoning.
For build, place burger patty on one slice of buttered Texas Toast and top with fried egg and 1/4 cup of OBHS Guacamole. Top with a second slice of buttered Texas Toast. Place on serving plate with desired accompaniments.