01 -  Preheat oven to 350°F. Grease and line a 9-inch round cake pan with parchment paper. 
 02 -  In a large mixing bowl, stir together crushed pretzels, flour, cheddar cheese, ranch seasoning, smoked paprika, cayenne pepper, baking powder, and baking soda until evenly blended. 
 03 -  In a separate bowl, whisk eggs, buttermilk, melted butter, hot sauce, and Dijon mustard until smooth. 
 04 -  Pour the wet mixture into the dry mixture and gently stir until just incorporated. Avoid overmixing to maintain tender texture. 
 05 -  Transfer the batter to the prepared cake pan and smooth the surface with a spatula. 
 06 -  Evenly distribute mini pretzels, chopped pickled jalapeños, and Parmesan cheese over the batter. 
 07 -  Bake in the center of the oven for 28 to 32 minutes, or until a toothpick inserted into the middle emerges clean and the surface is golden brown. 
 08 -  Rest cake in the pan for 10 minutes, transfer to a wire rack, then slice and present warm or at room temperature.