Heat the oven according to the fries' package temperature (usually 425°F) and spread the fries in a single layer on a large rimmed sheet pan.

Bake for the time listed on the bag, until the fries are golden and crisp at the edges.

Warm the chili in a saucepan over medium heat, stirring occasionally, until it is hot all the way through and slightly thickened.

Pull the fries from the oven and immediately pour the hot chili evenly over the top.

Scatter the cheddar cheese over the chili, covering as much of the pan as possible.

Return the pan to the oven for 3 to 5 minutes, just until the cheese is fully melted.

Scatter the pickled jalapeños over the top.

Finish with small dollops of sour cream and serve straight from the pan while the cheese is still stretchy.