Combine the cream cheese and butter. Add the minced chives or scallions, horseradish, Dijon mustard, and lemon juice and zest. Flake the trout into the mixture and stir to blend well, breaking up larger pieces of smoked trout.
Chill for an hour. Garnish with parsley if desired. Serve with bagels, crackers, bagel chips, or baguette slices.
Notes
Smoked trout spread will keep for up to 4 days in an airtight container in the refrigerator. It doesn’t freeze well.