Add butter in a medium bowl, put the bowl in the microwave set on medium until the butter has
Set the butter aside allowing it to slightly cool.
Add in the sugar.
With an electric mixer, beat the butter and sugar together until smooth.
Continue mixing while adding both the eggs and vanilla.
Slowly add in the pumpkin puree. Mix to combine.
Whisk flour, baking powder, salt, and cinnamon together in a bowl.
Use a rubber spatula to blend the dry ingredients in with the wet ingredients.
Do not overmix.
Add in the white chocolate chips and the chopped white chocolate-covered pretzels.
Use a rubber spatula to spread the batter in the baking pan and smooth the top of the batter.
Sprinkle chopped pretzels on top.
Bake at 350 degrees for 30-45 minutes or until the top is golden brown and shiny.
Remove from the oven and place the pan on a wire rack to cool.