Use your favorite dairy or nondairy milk. Oat milk, almond milk, and regular dairy milk can all work well.
Pears can replace the apples for a different fruit variation.
For additional sweetness, serve warm oatmeal cups with an extra drizzle of maple syrup.
A spoonful of yogurt, nut butter, or additional chopped fruit makes an easy topping and turns a couple of oatmeal cups into a more substantial breakfast.