Gather all your ingredients and tools.
Set your crockpot to low heat.
Add the white chocolate chips to the crockpot.
Add the semi-sweet chocolate chips to the crockpot.
Stir gently to combine the chocolates.
Allow the chocolate to melt for about 30 minutes, stirring occasionally.
Once melted, add the peanuts to the mixture.
Stir in the crushed pretzels and mini marshmallows.
Add the vanilla extract and mix well.
Spoon the mixture onto a parchment-lined baking sheet and sprinkle with colorful sprinkles.
Let it cool and harden for about 1-2 hours before breaking into pieces.