1 cup butter
2 cups sugar
2 teaspoons vanilla
4 eggs, slightly beaten
1 cup all-purpose flour
½ cup unsweetened cocoa
¼ cup Nutella
½ teaspoon salt
Heat oven to 350°. Grease mini muffin tin (or use mini liners).
In medium saucepan over medium-low heat, melt butter; turn of heat. Add sugar, vanilla, and eggs; blend well.
Stir in flour, cocoa, Nutella, and salt; mix well. Scoop into mini muffin tins; fil each cup about ⅔ full.
Bake at 350° for 12-15 minutes.
Cool completely in muffin tin. When cool, remove carefully, loosening sides with butter knife if needed.