Line an 8-inch loaf pan with parchment paper or wax paper. Set aside.
Melt the chocolate & pecan butter together using the double boiler method or the following: add chocolate and pecan butter to a microwave-safe bowl. Heat in 20-second increments until chocolate is fully softened and mostly melted. Stir in between heating increments, until smooth.
Pour the chocolate mixture into the prepared loaf pan. Using a rubber spatula, smooth into an even layer. Optionally, top with pecans.
Chill in the freezer for 40-70 minutes, or until firm. Slice and enjoy! Storing instructions below.
Storing Instructions: Store in an airtight container in the refrigerator. Keep out of direct sunlight and away from heat sources.
Freezing Instructions: store in a freezer-friendly container in the freezer for 1-2 months. Allow to thaw for 10 minutes before enjoying, or, enjoy immediately if you like it firm.