Preheat your oven to 400°F and line a baking sheet with foil. Grab your bread slices and arrange them in a single layer on the sheet. This setup takes literally one minute but prevents the bottom from burning while the top gets crispy.
Heat the butter and olive oil together in a small skillet over medium-low heat for about 90 seconds. Add your minced garlic, garlic powder, salt, and pepper to the melted butter. Stir constantly for just 30 seconds—you want the garlic fragrant but not browned, which happens way faster than you'd think.
Remove the skillet from heat and let it cool for one minute. Brush the garlic butter mixture generously onto each bread slice using a pastry brush or the back of a spoon. Make sure you get every bit of that garlicky goodness into every corner.
Sprinkle the shredded mozzarella evenly across all 4 slices, dividing it equally. Sprinkle the dried oregano over the cheese, then finish with the fresh chopped parsley. The oregano releases its oils when it hits the heat, so don't skip this step.
Place the baking sheet in your preheated oven and bake for 8 to 10 minutes until the cheese melts and the bread edges turn golden brown. Watch it after minute 8 because ovens vary—you don't want burnt corners. I always peek at mine through the oven window since I learned the hard way that timing matters here.
The garlic bread homemade recipe is done when you see slight browning on the edges and the cheese bubbles a little. If the cheese hasn't melted yet but the bread looks done, give it another 60 to 90 seconds. Remove the baking sheet from the oven using oven mitts because that foil gets seriously hot.
Let the slices cool on the baking sheet for exactly 2 minutes before serving. This prevents the cheese from sliding off and gives everything a chance to set slightly. Serve warm and watch people fight over the last slice—I'm not even joking.