Make-Ahead Blackberry Lemon Overnight Oatmeal Muffins

Blackberry Lemon Overnight Oatmeal Muffins combine quick-cooking oats soaked overnight with whole wheat flour and almond milk for moist, tender muffins brightened by fresh lemon and juicy blackberries. These make a wholesome breakfast, an easy on-the-go snack, or a tasty addition to packed lunches.

This recipe was first shared in May 2017 and has since been refreshed with updated text and photography.

What are overnight oatmeal muffins?

Overnight oatmeal muffins start with oats that are soaked in liquid until soft, then combined with the remaining muffin ingredients. Soaking the oats creates a creamy base for the batter and helps the finished muffins stay moist without needing a lot of added fat. The method is ideal if you want to do the prep the night before and bake a fresh batch in the morning.

How to make Blackberry Lemon Overnight Oatmeal Muffins

Start the night before: combine one cup of quick-cooking oats with one cup of your chosen milk in a covered container and refrigerate overnight. The next morning, whisk an egg (or a flax egg for a vegan option) with oil, lemon juice, lemon zest and vanilla. Stir in the soaked oats until evenly combined.

In a separate bowl, mix the dry ingredients—whole wheat flour, coconut sugar (or your choice of sweetener), shredded coconut, baking soda and salt. Combine the wet and dry mixtures gently, mixing only until just incorporated to avoid tough muffins. Fold in about one cup of blackberries, then divide the batter into a greased 12-cup muffin pan (or use liners).

Bake at a high temperature briefly—15 to 17 minutes—so the muffins brown nicely while staying tender inside. Let them rest in the pan for a few minutes, then transfer to a wire rack to cool completely.

Which oats should you use?

Quick-cooking steel-cut oats or quick rolled oats both work, provided they are the quick-cooking variety. Steel-cut oats give a slightly nuttier texture and need a longer soak, while quick rolled oats will absorb liquid faster and can be soaked for 30–60 minutes if you need to hurry. For a creamier, more uniform crumb, choose rolled oats.

Best milk options

Almond milk is a common choice for its neutral flavor and light texture, but cashew milk will produce an even creamier result. Cow’s milk works too if dairy isn’t a concern. For a nut-free version, select a seed-based milk. Avoid canned coconut milk; use carton-style coconut milk if you prefer the flavor of coconut.

Substitutions and variations

This recipe is quite flexible. Swap quick-cooking oats types, change the milk to suit dietary needs, or replace whole wheat flour with all-purpose flour if that’s what you have. Coconut sugar can be swapped for brown or granulated sugar, and cane sugar works as well.

Blackberries pair beautifully with lemon, but you can use blueberries, raspberries, strawberries, cherries, or dried fruit when fresh berries are out of season. For added texture and flavor, try tossing in chocolate chips, chopped nuts or seeds.

If you need an egg substitute, use three tablespoons of egg whites or a flax egg (1 tablespoon ground flaxseed mixed with 3 tablespoons water and allowed to thicken) for a vegan option.

Can these muffins be vegan?

Yes. Replace the egg with a flax egg and use plant-based milk (almond, cashew, or seed milk). Also make sure your preferred sweetener and any mix-ins are vegan-friendly. These simple swaps preserve texture and flavor while keeping the recipe plant-based.

Related oatmeal muffin ideas

• Cranberry Orange Oatmeal Muffins
• Blueberry Almond Oatmeal Muffins
• Banana Blackberry Oatmeal Muffins

If you try this recipe, please leave feedback. Telling others how it turned out—any tweaks you made or tips to share—helps readers choose the variation that will work best for them.

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