Aunt Louise'S Cheese Squares

1. 1

   Melt cream cheese, Cheddar cheese, butter, and Worcestershire sauce together in top of a double boiler over simmering water, stirring frequently and scraping down the sides with a rubber spatula. Set aside to cool, about 10 minutes.

2. 2

   Beat egg whites in a glass, metal, or ceramic bowl until stiff peaks form; fold into cooled cheese mixture using a rubber spatula. Gently run spatula around the edges of the bowl, lifting the bottom up and over the center until blended.

3. 3

   Line a baking sheet with parchment paper.

4. 4

   Dip bread cubes into cheese and egg white mixture, coating thoroughly. Place on lined baking sheet and refrigerate, 8 hours to overnight.

5. 5

   Preheat oven to 400 degrees F (200 degrees C).

6. 6

   Bake in the preheated oven until golden, 10 to 12 minutes.

* Per serving · 4 servings · Values may vary.