Prepare the Garlic Butter:
In a small bowl, combine softened butter, garlic powder, and dried parsley. Mix until fully incorporated.

Assemble the Sandwiches:
Spread the garlic butter mixture evenly on one side of each slice of bread. On the non-buttered side, add a generous amount of the mozzarella and cheddar cheese blend.

Grill the Sandwiches:
Heat a skillet or griddle over medium heat. Place the bread slices with cheese facing inward onto the hot skillet. Cook for 2-3 minutes until the bread is golden brown and crispy. Flip and cook the other side for another 2-3 minutes until both sides are golden and the cheese is melted.

Serve:
Once golden and crispy, remove from the skillet, slice in half, and serve hot. Enjoy your cheesy, garlic goodness!