Recipe Details

Ingredients

• 8 tablespoons 

  (1 stick) unsalted butter, preferably European or Kerrygold

• 1 (8-ounce) loaf 

  unsliced Italian bread

• 2 

  medium scallions

• 5 cloves 

  garlic

• 2 tablespoons 

  mayonnaise

• 1/2 teapoon 

  garlic powder

• 1/2 teaspoon 

  freshly ground black pepper

• 1/2 teaspoon 

  granulated sugar

• 1/4 teaspoon 

  kosher salt

• 3 ounces 

  low-moisture shredded mozzarella cheese

• 3 ounces 

  Parmesan cheese

Description

1. Place 1 stick unsalted butter in a small bowl and let sit at room temperature until softened.

2. Arrange a rack in the middle of the oven and heat the oven to 425ºF. Line a baking sheet with parchment paper or aluminum foil.

3. Cut 1 loaf Italian bread in half horizontally with a serrated knife. Halve each piece crosswise for a total of 4 pieces. Place the pieces cut-side up on the baking sheet.