For best flavor, let the dip rest longer (up to overnight) so the corn and beans fully absorb the dressing and spices; if you prefer a lighter version, swap some of the mayonnaise for extra sour cream or plain Greek yogurt, and if using frozen corn, thaw and pat it dry first to avoid a watery dip. Adjust spice level by adding more jalapeño or a pinch of cayenne, and keep the jalapeño seeds and membranes if you like it hotter. This dip travels well for potlucks—just keep it chilled in a cooler and give it a good stir before serving.