In a small bowl, combine peanut butter, powdered peanut butter, maple syrup and vanilla. Mix well.
Add crushed pretzels. Mix well again.
Line an 8x8 pan with parchment or foil. Press peanut butter mixture evenly into the bottom on the pan.
Put chocolate chips + oil in a microwave safe bowl. Microwave for 30 seconds. Stir. Repeat until melted.
Pour chocolate evenly over the peanut butter mixture. Spread evenly.
Top with pretzels and a little salt, if you want.