Start by washing your russet potatoes and slicing them into even, thick matchsticks so they cook uniformly. I like to leave the skins on for extra texture and nutrients, but peeling them works fine too. Cutting them the same size matters more than anything else here, since uneven pieces cook unevenly.
Place your cut potatoes in a bowl of cold water and let them sit for at least 30 minutes. This step pulls out excess starch, which is the secret to getting genuinely crispy fries instead of limp ones. Once soaked, dry them thoroughly with a towel because any leftover moisture will steam the fries instead of crisping them.
Toss the dried fries with oil, salt, garlic powder, and smoked paprika in a large bowl until evenly coated. Spread them in a single layer on a parchment-lined baking sheet, making sure they aren't touching each other. Roast at 425°F for about 20 minutes, then flip and roast another 15 minutes until deeply golden.
Once your fries are crispy, transfer them straight into your serving bowl while they're still hot. Sprinkle the shredded cheddar generously over the top so it starts melting immediately from the residual heat. If it needs more melting power, pop the bowl under the broiler for one to two minutes.
Scatter the crispy crumbled bacon evenly over the melted cheese so every bite gets a bit of crunch. Drizzle the ranch dressing over the top in a zig-zag pattern for that classic loaded-fries look. Finish with chopped green onions and jalapeños if you're using them.
Loaded fries bowls are best enjoyed the moment they're assembled, while the cheese is still gooey and the fries are still crunchy. Waiting too long lets the toppings soften the fries underneath. Grab a fork, dig in, and enjoy the mess.