Step 1

Preheat oven to 375° and spray a 9x13 with nonstick cooking spray.

Step 2

Crush pretzels into small pieces with food processor.

Step 3

Using a medium bowl, add pretzels, vanilla, brown sugar, and flour together until combined.

Step 4

Melt butter and add to pretzel mixture. Stir until combined.

Step 5

Spread mixture into prepared baking dish. Press mixture into a smooth layer.

Step 6

Bake for 10-12 minutes and let cool.

Step 7

In a medium bowl, beat cream cheese until smooth then add powdered sugar. Beat until combined then add cool whip and mix until combined.

Step 8

Once crust has completely cooled, spread cream cheese mixture over pretzel mixture. Top with blackberry pie filling and spread evenly.

Step 9

Top with remaining pretzel mixture.

Step 10

Cover and refrigerate for 4 hours or overnight.