If you find that your sweet potato casserole has turned out too runny, there are a few steps you can take to help thicken it up: 1. Bake it longer: If the casserole is still in the oven and you notice it's runny, continue baking it for a bit longer. The extra baking time will help evaporate excess moisture and thicken the consistency. 2. Drain excess liquid: If the casserole is already out of the oven, carefully pour off any excess liquid pooling in the dish. Be cautious not to remove too much of the sweet potato mixture along with the liquid. 3. Return to the oven: Place the casserole back in the oven for an additional 10-15 minutes to allow further evaporation and thickening. Keep an eye on it to prevent over-browning. 4. Add a thickening agent: If the above steps don't yield the desired result, you can try adding a thickening agent to the casserole. One option is to sprinkle a small amount of cornstarch or arrowroot powder over the surface and gently mix it in. Return the casserole to the oven for a few more minutes to allow the thickening agent to work. Remember to use the thickening agent sparingly to avoid altering the flavor or texture too much. 5. Serve in individual portions: If the casserole remains runny even after attempting the previous steps, you can serve it in individual ramekins or bowls. This way, the runniness will be less noticeable, and each portion can be served more solidly. It's worth noting that sweet potato casserole tends to have a softer, somewhat custard-like texture due to the nature of the sweet potatoes. So, it may not be as firm as other casseroles. However, the steps above can help improve the consistency if it's excessively runny.