Follow the steps in order for the best result.
In a medium-sized mixing bowl, thoroughly combine the finely shredded gouda cheese and sour cream.
Using an electric mixer on medium speed, beat the cheese and sour cream mixture until it reaches a smooth and creamy consistency. This may take a minute or two.
Take a scant teaspoon of the creamy cheese mixture and carefully pipe or mound it onto the flat side of half of the pecan halves.
Gently top each cheese-covered pecan half with one of the remaining pecan halves, positioning the flat side down to create a sandwich.
Cover the cheese-stuffed pecans and chill in the refrigerator for at least 30 minutes before serving. This allows the cheese filling to firm up slightly, making them easier to handle and enhancing the flavor.