Place chocolate chips in a microwave safe bowl. Melt in 30 second increments on high power, stirring between each, until melted and smooth. If your chocolate has trouble melting, add 1 teaspoon of vegetable oil during the melting process.
Spread melted chocolate onto a cookie sheet that’s been lined with wax paper.
Cut mini candy bars in half and sprinkle them, along with any M&Ms or other candy of choice over the melted chocolate layer. Press lightly to adhere.
Melt the white chocolate at 50% power in increments of 30 seconds, stirring between each, until smooth. Place in a small sandwich bag and cut off one tip. Drizzle over the top of the bark. Chill to set, break into pieces.