Preheat the oven to 350F/180C.
Add the bacon to a large pan, then turn the heat to medium. Fry until the bacon is crisp and the fat has rendered out, then remove and leave the excess fat in the pan. Dice the bacon once it has cooled.
In a large bowl, add the cream cheese, bacon, sour cream, mayo, spring onion, jalapeños, cheddar, mozzarella and seasoning. Give it a good stir until everything is evenly blended, then place it in a suitably sized baking dish.
Crush the Ritz crackers into the pan of leftover bacon fat, then give them a good stir. Evenly spread over the dip.
Bake in the oven for around 25-30mins, or until golden brown and gooey right through the middle.
Serve with finger food and enjoy! Just be careful, it'll be scorching hot straight out the oven.