Toast 8 frozen waffles according to package until lightly golden; cool slightly.

Cook 8 bacon slices until crispy; drain on paper towels.

Slice 1 ripe avocado.

For each sandwich, layer one slice cheese, 2 slices bacon, one quarter of the avocado and a second slice cheese between two waffles.

Spread the total 2 tablespoons mayonnaise thinly over the outsides of the four sandwiches.

Heat a large skillet over medium-low heat.

Cook assembled sandwich in skillet 3-4 minutes, pressing gently with a spatula, until golden brown and crispy.

Carefully flip; cook another 3 minutes until second side is golden and cheese completely melted.

Transfer to a cutting board; rest 1 minute.

Cut in half diagonally and serve immediately.

Repeat to make 4 sandwiches total.