I really liked this idea...I ran into this on another website as well. I made 3 of these flavored butters for my Polish Wigilia feast: Garden Green Butter, Horseradish Butter and Anchovy Butter. I served them on a dark rye bread and light rye crispbread cut into small pieces. I added too much salt to the garden green one and too many anchovies to the anchovy one...I've learned my lesson for the next time. Our favorite was the horseradish. I let the butter soften and then just mashed in the other ingredients with a fork...very easy! Thanks for the fun recipe. I'll be making some again!