This is my favorite oatmeal cookie dough with big chewy oats and irresistible chocolate candies. I love using mini M&Ms so more candies are in every bite! Chilling the cookie dough for at least 30 minutes is imperative.
- 1 cup (230g) unsalted butter, softened to room temperature
- 1 cup (200g) packed light or dark brown sugar
- 1/4 cup (50g) granulated sugar
- 2 large eggs*
- 1 Tablespoon pure vanilla extract (yes, Tablespoon!)
- 1 Tablespoon molasses
- 1 and 1/2 cups (190g) all-purpose flour (spoon & leveled)
- 1 teaspoon baking soda
- 1 and 1/2 teaspoons ground cinnamon
- 1/2 teaspoon salt
- 3 cups (240g) old-fashioned whole rolled oats*
- 1 and 1/2 cups (240g) M&Ms*
- Using a hand mixer or a stand mixer fitted with paddle attachment, cream the softened butter and both sugars together on medium speed until smooth, about 2 minutes. Add the eggs and mix on high until combined, about 1 minute. Scrape down the sides and bottom of the bowl as needed. Add the vanilla and molasses and mix on high until combined. Set aside.
- In a separate bowl, toss the flour, baking soda, cinnamon, and salt together. Add to the wet ingredients and mix on low until combined. Beat in the oats and M&Ms on low speed. Dough will be thick, yet very sticky. Chill the dough for 30-60 minutes in the refrigerator (do the full hour if you’re afraid of the cookies spreading too much). If chilling for longer (up to 2 days), allow to sit at room temperature for at least 30 minutes before rolling and baking.
- Preheat oven to 350°F (177°C). Line two large baking sheets with parchment paper or silicone baking mats. Set aside.
- Roll balls of dough (about 1 and 1/2 Tablespoons of dough per cookie) and place 2 inches apart on the baking sheets. Bake for 11-12 minutes or until lightly browned on the sides. The centers will look soft and under-baked. Remove from the oven and let cool on baking sheet for 5 minutes before transferring to a wire rack to cool completely. The cookies will continue to “set” on the baking sheet during this time.
- Cover and store leftover cookies at room temperature for up to 1 week.
- Make Ahead & Freezing Instructions: Baked cookies freeze well up to three months. Unbaked cookie dough balls freeze well – up to three months. Bake frozen cookie dough balls for an extra minute, no need to thaw. Here’s how to freeze cookie dough.
- Oats: For these oatmeal cookies, I use and recommend old-fashioned whole oats. They provide the ultimate hearty, chewy, thick texture we love!
- Eggs: Room temperature eggs preferred. Good rule of thumb: always use room temperature eggs when using room temperature butter.
- M&Ms: I recommend using mini M&Ms so there’s more in each bite. Regular M&Ms work too. If the M&Ms are larger, such as peanut M&Ms or peanut butter M&Ms, I recommend chopping them. If desired, grab an extra 2 Tablespoons of M&Ms and press a few into the top of each cookie when they’re warm from the oven. This is purely for looks!
- Be sure to check out my top 5 cookie baking tips AND these are my 10 must-have cookie baking tools.
- Adapted from Loaded Oatmeal Cookies & Oatmeal Creme Pies. Recipe originally published on Sally’s Baking Addiction in 2012.
Keywords: M&Ms, chocolate, oatmeal