In Peppermint Bark recipes, how do you blend in the white chocolate and dark chocolate?

I heard a problem is that the white and the dark chocolate gets separated, how do you make this seamless? Does it have to do with using chips or chopped chocolate?In Peppermint Bark recipes, how do you blend in the white chocolate and dark chocolate?
Melt both chocolates and swirl together with a knife. An alternative is to make the base from the dark chocolate and then top with the white chocolate and crushed candies.In Peppermint Bark recipes, how do you blend in the white chocolate and dark chocolate?
it really doesn't matter because you have to melt it.

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