Step 1

Butter a 9x13-inch pan.

Step 2

Melt butter in a large saucepan over medium-high heat. Add evaporated milk and sugar. Bring to a rapid boil. Stir and boil for 7 minutes.

Step 3

Remove from heat. Add peanut butter and marshmallow cream and stir until completely blended. Pour into the prepared pan and refrigerate until set, 1 to 2 hours. Cut into squares.