In a mixing bowl, combine the softened cream cheese and shredded cheddar cheese. Stir in the finely chopped jalapeños, followed by the garlic powder and onion powder. Season with salt and black pepper, then mix thoroughly until all ingredients are evenly blended.
Lay an egg roll wrapper flat on a clean, dry surface, ensuring that one corner is pointing directly towards you.
Spoon approximately 2 tablespoons of the jalapeño cheese mixture onto the center of the wrapper.
Fold the bottom corner of the wrapper over the filling, tucking it snugly. Next, fold in the side corners towards the center. Roll the wrapper tightly away from you to fully enclose the filling. If needed, use a little water on your fingers to moisten the edges, ensuring a secure seal.
Repeat the process with the remaining egg roll wrappers and filling mixture until all are filled and rolled.
In a deep pan or pot, heat vegetable oil over medium-high heat until it reaches about 350°F (175°C). To test the oil, drop a small piece of bread into it; if it sizzles and bubbles, it's ready.
Carefully place a few egg rolls into the hot oil, ensuring not to overcrowd the pan. Fry for about 3-4 minutes, turning occasionally until they achieve a golden brown and crispy exterior.
Once cooked, use a slotted spoon to remove the egg rolls from the hot oil. Transfer them to a plate lined with paper towels to absorb any excess oil.
Serve the mini jalapeño popper egg rolls warm, accompanied by ranch dressing on the side for dipping, if desired.