Raspberry Butter

1 cup raspberries
2 tablespoons water
1 tablespoon sugar
1/2 cup butter, at room temperature
2 tablespoons powdered sugar
1 teaspoon blackberry liqueur
1/4 teaspoon lemon juice

Boil raspberries, water and sugar in a small saucepan over medium heat until syrupy, stirring frequently, about 5 minutes. Strain through sieve to remove seeds. Cool. Process with remaining ingredients until smooth and well mixed. Can be prepared one day ahead. Cover and chill. Bring to room temperature and stir before serving.