To make the jars, hot glue buttons on the jar to make the snowman buttons. Set aside
In a large bowl add Chex. Set aside.
In a microwave safe bowl add peanut butter, chocolate chips and butter. Microwave in 30 second increments, stirring between each time until blended and creamy, about 1 minute.
Stir in vanilla and salt.
Pour mixture over Chex and gently mix to coat.
Add 3 cups of Chex into a large gallon size bag along with 2/3 cup powdered sugar and gently shake to coat. Add mixture to a airtight container or jars.
Continue doing this 2 more times with 3 cups of Chex mixture with 2/3 cup powdered sugar.
Store in an airtight container for about 5 days or freeze for up to 3 months. Thaw at room temperature before serving.