1. Combine the main ingredients: In a blender, add the canned pumpkin puree, vanilla ice cream, milk, packed brown sugar, pumpkin pie spice, and vanilla extract.

2. Secure the blender lid: Make sure the lid is tightly secured on your blender to prevent any spills during blending.

3. Blend until smooth: Start blending on a low speed and gradually increase to high. Blend for about 30-60 seconds, or until the mixture is completely smooth and creamy. There should be no lumps of ice cream or pumpkin remaining.

4. Check consistency: If the milkshake is too thick for your liking, add another splash or two of milk and blend again for a few seconds until it reaches your desired consistency. If it’s too thin, add another small scoop of ice cream and blend.

5. Pour into glasses: Carefully pour the freshly blended pumpkin pie milkshake into serving glasses.

6. Add optional toppings: If desired, top each milkshake with a generous swirl of whipped cream.

7. Garnish and serve: Finish with a sprinkle of ground cinnamon or a little extra pumpkin pie spice on top of the whipped cream for an extra touch of flavor and visual appeal. Serve immediately and enjoy!