Combine all ingredients in the rice cooker bowl. Give everything a good stir to combine.
Set the rice cooker for Porridge, Oatmeal, or Steel Cut Oats, depending on your rice cooker model.Set the timer for the cycle to start an hour before you want to serve the cooked oats.
When cycle is done, stir the oatmeal mixture. Set the rice cooker to Warm if your rice cooker doesn't have an auto-warm feature.Steel cut oats continue to thicken as they cool, so don’t worry if they seem too thin when you initially open the rice cooker.
Serve warm, with toppings on the side as desired.
Notes
These recipe ingredients highlight our favorite rice cooker oatmeal flavor-combo. You can easily adapt this to your own tastes by changing up the liquids, fruits, and flavorings.Ratio of Steel Cut Oats to Liquid: For each cup of steel cut oats, use 3½ to 4 cups of liquid, depending upon how thick you'd like your oats to be. (The less liquid you use, the thicker they will be.) You can use water and milk in any combination, from all water to all milk. I usually use a combo of 2½ cups of milk to one cup of water. This results in thick, rich oats without being overly so.Max Capacity: To avoid messy, frustrating boil-overs, use a maximum of 1 cup of oats in a 3-cup rice cooker; 2 cups in a 6-cup rice cooker.We do not recommend cooking steel cut oats in a single-setting rice cooker. The heat rises too quickly, and as a result, the liquids have a tendency to boil over. However, if you want to try, in our experience, the following method is the most successful:For rice cookers with only Cook and Warm settings: Allow the liquids in the rice cooker to reach a boiling point, and then switch the setting to Warm. Cook for 35-50 minutes, or until oats are cooked to the desired consistency.