To make this recipe gluten-free. Ensure all ingredients, especially the powdered sugar and vanilla extract. Are certified gluten-free. Some powdered sugars contain cornstarch. Which can be cross-contaminated with gluten. Using a gluten-free brand. Will ensure your fudge is safe. For those with gluten sensitivities. Or celiac disease. Additionally, check that your pecans. Are not processed in a facility. That handles gluten products. With these adjustments. You can enjoy this delicious treat. Without any gluten worries.