Refrigerate the whipping cream and the greek yogurt for at least 6 hours.
Before starting to prepare the parfaits, place a large mixing bowl (glass or metal) in the freezer for 15 minutes.
Remove the bowl from the freezer and combine inside peanut butter, yogurt, honey and heavy cream. Beat with an electric mixer first at low speed and then at high speed, until the mixture thickens and becomes creamy.
Place some of the mini pretzels on the bottom of 4-6 glasses. Spoon some of the yogurt mixture on top. Cover with blueberries. Repeat the procedure in order to make 2 layers of each product. Top with generous amount of blueberries and mini pretzels.
Serve immediately or after refrigerating for few hours.
You need to refrigerate the cream, the yogurt and the mixing bowl in order to obtain thick consistency when beating the ingredients. The peanut butter and the honey should not be refrigerated as this will make them too firm and hard to get creamy.