Chocolate Chip Oatmeal Streusel Muffins

These Chocolate Chip Oatmeal Streusel Muffins are so scrumptious and flavourful! They are soft, fluffy, and full of hearty oats and gooey chocolate. Before baking, an oat streusel is sprinkled on top.

This is a classic muffin that comes together with simple, everyday ingredients that you probably already have sitting in your pantry.

The muffins have a very simple streusel sprinkled on top. While streusel is not necessary for the muffins, it does elevate them soo much and adds a lot of texture and flavour!

Let's get to baking!

For more muffin recipes, try Chocolate Chip Streusel Muffins, Coconut Chocolate Muffins, and Carrot Oatmeal Muffins.

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• Ingredients Notes
• Step by step instructions
• Expert Baking Tips
• FAQ
• Check out more oatmeal recipes
• Oatmeal Chocolate Chip Streusel Muffins

Ingredients Notes

Feel free to check this section to view certain key ingredients we’re using! Continue scrolling down for the recipe card with measurements.

• All-purpose flour – This flour is used for the muffins and cannot be substituted for any other.
• Brown sugar – I used light brown sugar, but dark brown sugar works as well!
• Butter - I always use unsalted butter. This will be melted and cooled and used for the streusel.
• Chocolate chips - I find mini chocolate chips work best for these muffins as they create perfect little pockets of chocolate. You can also use semi-sweet chocolate chips, but there will be more chocolate in the muffin.
• Cornstarch – Used to enhance the muffin texture.
• Cinnamon - Adds a lot of depth to the flavour! 
• Eggs – Must be at room temperature before starting your bake.
• Oil – I used a flavourless oil. You can use any type of oil, but flavoured ones will slightly change the taste.
• Oats - Make sure to use rolled oats, also known as large flake oats. Quick oats will not work for this recipe!

Step by step instructions

Here is how to make and bake these Chocolate Chip Oatmeal Streusel Muffins. You will need a 12 muffin tin, muffin liners, 2 mixing bowls, a spatula, and a whisk.

Step 1 – Prep. Line your muffin tin with 12 liners and set aside. If you need a recommendation, this is my favourite tin.

Step 2 – Make the streusel. In a medium sized bowl, add flour, white sugar, brown sugar, oats, cinnamon, and melted and cooled (but still liquid) butter. Using a fork, mix this until crumbly and combined. Add an extra tbsp of flour on top to help absorb the extra butter and break the streusel into bigger and smaller pieces. Set aside while you make the muffin batter.

Step 3 – Mix together dry ingredients. In a medium-sized bowl, add in flour, oats, cinnamon, salt, cornstarch, baking powder, and baking soda. Using a spatula, mix until just completely combined.

Step 4 – Mix wet ingredients. Into a large bowl add eggs, vanilla, brown sugar, oil, and sour cream. Whisk until combined.

Step 5 - Combine dry and wet ingredients. Add the dry into the wet and using a spatula, gently fold until a soft batter forms.

Step 6 - Add in chocolate chips. Mix in the mini chocolate chips until just combined. Do not over-mix!

Step 7 – Scoop. Evenly divide the batter between 12 liners. Using a cookie scooper helps big time to minimize the mess. Sprinkle a handful of streusel on top of each muffin.

Step 8 – Bake. Bake the muffins at 425℉/218℃ for 5 minutes and then 375°F for 15-20 minutes. The muffins are ready when a toothpick inserted comes out clean.

These muffins stay fresh covered at room temperature for up to 3 days, and in an airtight container in the refrigerator for up to a week!

Expert Baking Tips

Here are a few expert baking tips from my kitchen to yours

• Use a gram scale. I cannot emphasize this enough! It is the most accurate way of measuring your ingredients in the kitchen. This is one of my favourites.
• Do not over-mix! A big reason muffins don’t rise or turn out tough is because the batter is over-mixed. Once you see no flour streaks, stop mixing.
• Use large-flake oats. This will give you the best texture of muffin.

FAQ

Do I have to add milk?

Yes! This is one of the main wet ingredients in these muffins. You can use dairy or non-dairy milk such as almond milk.

Do I have to add oats?

Yes! For a classic chocolate chip muffin recipe, check out The Best Chocolate Chip Muffins.

Check out more oatmeal recipes

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