Place the cream cheese in a medium bowl and let sit until softened.

When the cheese is soft, stir in the horseradish and lemon juice until smooth.

Using a fork, carefully remove the skin from the mackerel fillets.

Break the fillets into small pieces with a fork, looking out for any bones (discard those).

Stir the smoked mackerel pieces into the cream cheese mixture.

Add salt and pepper to taste.

Serve with crackers or pita chips.