Use flour that's sold as heat-treated. Whisk out any clumps.
In a large bowl combine, peanut butter, brown sugar, granulated sugar, butter, vanilla extract, and heavy cream. Use a hand mixer on medium-high to mix everything together, using a rubber spoon to scrap the sides of the bowl to make sure everything gets mixed and is nice and fluffy.
Mix in the oats and flour.
Very gently fold in the chocolate chips, M&M candies and pretzels, you can lightly crush the pretzels while folding.
Store in an airtight container for up to 5 days and enjoy.
Notes
Try dark chocolate!
Use any candy-coated chocolate you’d like.
Use a different shape of pretzels!
Food Safety: Raw flour can carry harmful bacteria. The FDA advises against heat-treating flour at home, because it may not kill all of them. For dough you'll eat raw, use flour sold as heat-treated or ready to eat.