Christmas Monster Cookies: Oats, Pretzels & Holiday M&M’s
Last December, I burned my third batch of Christmas cookies in one evening — the smoke alarm went off twice — and I sat on the kitchen floor genuinely questioning my life choices. I wanted one cookie that did everything: chocolate, crunch, chew, a little salt, and enough festive color to pass as a gift. But every recipe I tried was either too fussy or too flat.
These Christmas monster cookies fix all of that. One bowl, no chilling, 35 minutes start to finish. You get crisp edges, a soft and gooey center, salty pretzel bits, and pops of red and green M&M’s throughout — exactly the kind of cookie that disappears from a tin before you’ve even tied the ribbon.
Pro Tip
The mistake most bakers make: pressing all the M&M’s into the dough before baking. They sink, crack, and lose their color. Instead, fold only half the M&M’s into the dough, then pull the tray out at the 10-minute mark and press the remaining ones directly onto the surface of each cookie. They bake in for just 2–3 minutes, stay whole, and sit proud on top — which is exactly what makes these cookies look like they came from a bakery window, not a rushed Tuesday night.
Holiday M&M’s (red and green) are widely available in supermarkets from November through December — grab them early, they sell out fast. Old-fashioned rolled oats work best here; instant oats turn mushy. For the chocolate, semi-sweet chips or roughly chopped dark chocolate bar both work. Mini pretzel sticks or pretzel twists crushed into rough pieces are interchangeable.
Christmas Monster Cookies: Oats, Pretzels & Holiday M&M’s
20
servings20
minutes15
minutes364
kcal35
minutesIngredients
1 cup (2 sticks / 225g) salted butter, at room temperature
1 cup (200g) dark brown sugar, packed
1/2 cup (100g) granulated sugar
2 large eggs
1 egg yolk
1 tbsp vanilla extract
2 cups (250g) all-purpose flour
2 tsp baking soda
2 tsp baking powder
1/2 tsp kosher salt
2 cups (180g) old-fashioned rolled oats
1 1/4 cups (220g) holiday M&M’s, divided
1 cup (60g) mini pretzel sticks, roughly crushed
1 cup (175g) semi-sweet chocolate chips or chunks
1/2 cup (90g) white chocolate chips
Directions
- Preheat to 350°F (175°C). Line two baking sheets with parchment paper. Two sheets means you can rotate batches without waiting — keeps the whole process moving.
- Beat butter, both sugars, and vanilla until pale and fluffy, about 2 minutes. The mixture should look almost like wet sand turning into cream — that’s the air going in, which gives you lift in the oven.
- Add eggs and yolk one at a time, beating after each. The extra yolk adds fat without extra white — that’s what keeps the centers soft and fudgy rather than cakey.
- Add flour, baking soda, baking powder, and salt. Mix until just combined, then stir in the oats. Stop mixing the moment you can’t see dry flour — overworking the dough makes cookies tough.
- Fold in half the M&M’s, the crushed pretzels, chocolate chips, and white chocolate chips. Use a spatula here, not the mixer — you want the pretzel pieces to stay in rough chunks for crunch, not get pulverized.
- Scoop dough into 1/4-cup (60ml) balls and place 3 inches (7.5cm) apart on the prepared sheets. These spread — that gap is not optional. Crowded cookies merge into one sad slab.
- Bake 8 minutes, rotate the pan, bake 2 more minutes. Pull the tray out now — the edges should be just set and lightly golden, while the centers still look underdone and slightly glossy.
- Press the remaining M&M’s onto the top of each cookie. Bake a final 2–3 minutes. You’ll smell the warm chocolate and toasted oats before the timer goes off — that’s your cue they’re nearly done.
- Cool on the baking sheet for 10 minutes before moving. They firm up as they sit — moving them too early means they break apart in your hands.
Variations
For a thicker, less-spread cookie, skip the extra egg yolk and use just 2 whole eggs — the dough holds its shape better and bakes up chunkier. Swap the holiday M&M’s for peanut butter chips and dark chocolate chunks if you want a year-round version that works just as well in July.
Serving Suggestions
Serve warm alongside a glass of cold whole milk — the contrast with the still-gooey center is the whole point. A scoop of vanilla ice cream sandwiched between two cooled cookies turns them into a proper dessert. They also pack well in a tin layered with parchment, making them a solid edible gift.
FAQ
Why do my cookies spread too thin?
The most common cause is butter that’s too warm — if it’s greasy or shiny when you start mixing, the dough won’t hold its shape. Aim for butter that dents when you press it but doesn’t smear. Also check that your baking soda and baking powder aren’t past their best-by date, since expired leaveners cause flat cookies.
Can I make the dough ahead and freeze it?
Yes — scoop the dough into balls, freeze them on a tray until solid, then transfer to a zip-lock bag for up to 6 weeks. Bake straight from frozen at 350°F (175°C), adding 3–4 minutes to the bake time. It’s genuinely one of the most useful things you can do in December.
Can I use quick oats instead of old-fashioned rolled oats?
You can, but the texture shifts noticeably — quick oats absorb more moisture and make the cookie denser and slightly gummy in the center rather than chewy. Old-fashioned oats keep their structure and give you that distinct bite. It makes you wonder what else changes when you swap oats in baked goods — peanut butter oat cookies, for instance, behave completely differently.
