I mix them together before cooking them down. The color is more red from the raspberries than peach colored, but the taste is out of this world. I use 3/4 peaches to 1/4 raspberries, if you want it more raspberrier (I don't think that's a word, but it works) do 2/3 peaches and 1/3 raspberries. Or I guess you could even do half and half, though I never have.
