Rinse and scrub the sweet potato well, then peel it with a vegetable peeler. Cut into roughly 1-inch chunks so they cook evenly. Smaller chunks cook a little faster, but they don’t need to be perfect.
1 medium sweet potato
Peel the apples, core them, and cut into 1-inch chunks. Aim for similar-sized pieces so the apples and sweet potato soften in about the same amount of time.
2 medium apples
Add the sweet potato and apple chunks to a medium saucepan. Pour in about 1/2 cup water—just enough to barely cover the bottom of the pan. Cover with a lid, bring to a gentle simmer over medium heat, and cook for 10–15 minutes, stirring once or twice, until both are very soft when pierced with a fork. If the pan looks dry, add a splash more water.
1 medium sweet potato, 2 medium apples, 1/2–1 cup water, breast milk, or prepared formula
Turn off the heat and let the mixture cool for about 5 minutes. This helps avoid steam building up in the blender and makes it safer to handle. For faster cooling, transfer the mixture to a wide, shallow bowl.
Transfer the cooked sweet potato and apple, along with any remaining cooking liquid, to a blender or food processor. Add 1/4–1/2 cup additional water, breast milk, or formula to start. Blend on high until completely smooth, scraping down the sides as needed, until there are no visible chunks.
1 medium sweet potato, 2 medium apples, 1/2–1 cup water, breast milk, or prepared formula
For a very smooth, thin first-foods puree, add more liquid a tablespoon at a time and blend again until pourable, like thin yogurt. For older babies, keep the puree a bit thicker, or blend for a shorter time to leave a little more texture.
1/2–1 cup water, breast milk, or prepared formula
Once the puree is smooth and has cooled to warm (not hot), add 1–2 teaspoons unsalted butter or neutral oil and a tiny pinch of ground cinnamon, if using. Blend briefly to combine. Adding fat after cooking keeps the flavor fresh and helps with nutrient absorption.
1–2 teaspoons unsalted butter or neutral oil, 1 pinch ground cinnamon
Spoon some puree into a clean bowl for serving and let it cool completely to room temperature. Transfer the remaining puree into ice cube trays, silicone baby food trays, or small airtight containers. Standard ice cube trays hold about 1 tablespoon per cube—great for early, small portions.
Offer a tiny spoonful to your baby. You can thin the puree in the bowl with a bit more water, breast milk, or formula if needed. Expect some mess—early feeding is about exploration as much as nutrition.