Gather the ingredients. Measure the water, salt, hominy grits, shredded sharp Cheddar cheese, butter, and freshly ground black pepper.
Boil the water. Pour 3 cups of water into a medium saucepan. Add the salt and bring the water to a full boil over medium-high heat.
Whisk in the grits. Gradually add the hominy grits to the boiling water, whisking continuously for 1 minute. This helps distribute the grits evenly and prevents lumps from forming.
Reduce the heat. Once the mixture returns to a boil, lower the heat to low. Allow the grits to cook at a gentle simmer rather than a rapid boil.
Cook until thickened. Continue cooking for 10 to 15 minutes, stirring frequently to prevent the grits from sticking to the bottom of the saucepan. The mixture should gradually thicken as the grits soften.
Remove from heat. Once the grits are tender and have reached a thick, creamy consistency, remove the saucepan from the heat.
Add cheese and butter. Stir in the shredded sharp Cheddar cheese, butter, and freshly ground black pepper.
Mix until creamy. Continue stirring until the cheese and butter melt completely and blend into the hot grits.
Serve warm. Spoon the cheesy grits into serving bowls and enjoy immediately while smooth, creamy, and hot.