A Shortcut Sugar Cookie Bar Recipe I Keep Coming Back To
Okay, let’s get this out of the way: sometimes you just do not have it in you to bust out a full sugar cookie dough, chill it, roll it, cut it, re-roll the scraps (ugh, that step), and then deal with frosting plus sprinkles plus the kitchen mess. Nope. That’s why, on a Friday night after a particularly long week (maybe I’ve got flour on my shirt and don’t even care), I make these cake-mix sugar cookie bars instead. I first tried these at a block party—Sally from down the street brought a pan and, not gonna lie, I followed her around the yard until she gave up the recipe. My family demolished the whole tray before anyone even thought to take a picture for Instagram, so… here we are. What can I say, I grew up in a house where we prioritized snacks over selfies!
Why You’ll Love This Silly-Easy Cookie Hack
I make these when I need a dessert fast or when I don’t feel like firing up the whole “baking from scratch” operation (which is pretty often in July, let’s be real). My family goes bonkers for these because they taste like boxed birthday cake married an old-school bakery sugar cookie—plus the edges are soft, not crunchy (I know some folks love a crispy cookie, but these are basically the doughy middle piece, every time). Also, maybe it’s just me, but cutting into a sheet pan of anything just feels way easier than scooping out dough one blob at a time. Oh, and it saves dishes. The amount of bowls this saves me alone—incredible.
Here’s What You’ll Need (and What You Could Swap)
- 1 box (about 15.25 oz or 432g) white cake mix (actually, yellow mix is fine too—I sometimes use whatever’s on sale and nobody notices)
- 1/3 cup unsalted butter, melted (my gran swears by margarine, but I say go with what’s in your fridge)
- 2 large eggs (or 1/4 cup Greek yogurt in a pinch honestly works if you’re out of eggs—learned this on a snow day!)
- 1 tsp vanilla extract (I’ve totally skipped this if I’m in a rush, but if you have it, why not?)
- Pinch of salt (a couple shakes, nothing fancy—if your butter’s salted, maybe skip this)
- 1/2 cup sprinkles (optional, but my niece will boycott dessert if I forget them)
- Frosting: 1 tub (about 16 oz) vanilla frosting OR homemade if you’re feeling ambitious—no judgment
- Extra sprinkles for topping (I mean, why not?)
How To Make Sugar Cookie Bars Outta Cake Mix
- Preheat your oven to 350°F (175°C). Grease a 9×13 inch pan—sometimes I just line it with parchment if I’m too lazy to wash the pan after.
- In a big ol’ mixing bowl, dump in your cake mix, melted butter, eggs, vanilla, and salt. Stir with a wooden spoon—or honestly, I just use my spatula most days; fewer dishes.
- Fold in your sprinkles if you’re using them. The dough will look like thick play-dough at this stage. Don’t panic—it always does.
- Press the dough evenly into your baking pan. I use my hands; if it’s sticky, a bit of butter on your fingers goes a long way. (Also, this is when I usually sneak a taste. No shame.)
- Bake for about 20-23 minutes. You want the edges just turning golden—not brown, unless you really like crispy bars. It’ll look a little underdone in the middle, but that’s what makes them soft later. Trust me!
- Let them cool completely—in reality, I give it like 30 minutes because who can wait? But try, so the frosting doesn’t melt off.
- Once cool, spread with store-bought or homemade frosting. Dollop extra sprinkles. Slice into bars (squares, rectangles, weird shapes if you’re a rebel—no rules here).
Notes I Learned the Hard Way
- The first time I tried to halve the recipe, it ended up too thin and kind of sad. So just make the full pan (or if you have a smaller pan, check it early—they bake up faster!).
- If you’re heavy-handed with the sprinkles, the batter gets kinda weirdly grayish… still tastes good though.
- I used to overbake these out of fear—actually, I find it works better if you take them out before the center is fully firm.
Swaps, Switch-Ups, and the One That Didn’t Work
- I tried using chocolate cake mix once—honestly, that wasn’t my favorite, but maybe someone else would like it?
- Lemon cake mix with a lemony frosting is chef’s kiss, especially for summer.
- You can mix in white chocolate chips or real chopped nuts if you want crunch; my kids are suspicious of nuts though, so I rarely bother.
The Simple Gear You’ll Want (But Can Work Around)
- A 9×13-inch pan is standard, but one time I used two 8-inch squares because I couldn’t find mine—it worked fine, the bars were just slightly taller.
- A rubber spatula is handy, but I’ve definitely just used a soup spoon before. Cake-mix bars are forgiving.
How to Store (If You Have Any Left)
Just cover the pan with foil or plastic wrap. They keep at room temp for 2-3 days, but honestly, in my house, it never lasts more than a day! If you’ve got a really warm kitchen, maybe pop them in the fridge. I think they taste even better on day two, but that’s a rare thing around here.
How I Like to Serve These
I cut them into wonky squares and serve straight from the pan after dinner; sometimes at birthday parties I do wedges like “cookie pizza” and let the kids add their own toppings. My uncle requests his with a scoop of vanilla ice cream (bit over the top? Maybe. But it’s Uncle Jeff, what can I say?).
If I Could Give You Just One Pro Tip…
I once tried to frost these while they were still warm because I was impatient—the frosting just kind of… slid right off. Now I force myself to wait, clean up, and then frost. Much better result!
FAQ—Stuff Friends Actually Ask Me
- Do I really need to use a cake mix? Yep, that’s kind of the point with this one (though you can use white, yellow, or even funfetti for extra pizzazz—just not chocolate, unless you’re feeling wild).
- Can I double the recipe? Sure, but I’d use two pans so it bakes evenly. Otherwise the middle turns into molten goo (learned the hard way after a family reunion disaster…)
- Help—why are my bars dry? Probably baked a bit too long, or your oven runs hot. I’d say take them out earlier next time—or, if you already did it, just drizzle some milk on the slice and call it bread pudding.
- Can kids help? Oh totally—mine basically do all the stirring and sprinkle dumping now. Makes for slightly chaotic, but cuter-looking bars.
Anyway, don’t overthink it—these are simple cake-mix sugar cookie bars! Perfect for when you want something sweet, easy, and a little bit nostalgic.
Ingredients
- 1 box (about 15.25 oz or 432g) white cake mix
- 1/3 cup unsalted butter, melted
- 2 large eggs
- 1 tsp vanilla extract
- Pinch of salt
- 1/2 cup sprinkles (optional)
- 1 tub (about 16 oz) vanilla frosting OR homemade
- Extra sprinkles for topping
Instructions
-
1Preheat your oven to 350°F (175°C). Grease a 9×13 inch pan—sometimes I just line it with parchment if I’m too lazy to wash the pan after.
-
2In a big ol’ mixing bowl, dump in your cake mix, melted butter, eggs, vanilla, and salt. Stir with a wooden spoon—or honestly, I just use my spatula most days; fewer dishes.
-
3Fold in your sprinkles if you’re using them. The dough will look like thick play-dough at this stage. Don’t panic—it always does.
-
4Press the dough evenly into your baking pan. I use my hands; if it’s sticky, a bit of butter on your fingers goes a long way. (Also, this is when I usually sneak a taste. No shame.)
-
5Bake for about 20-23 minutes. You want the edges just turning golden—not brown, unless you really like crispy bars. It’ll look a little underdone in the middle, but that’s what makes them soft later. Trust me!
-
6Let them cool completely—in reality, I give it like 30 minutes because who can wait? But try, so the frosting doesn’t melt off.
-
7Once cool, spread with store-bought or homemade frosting. Dollop extra sprinkles. Slice into bars (squares, rectangles, weird shapes if you’re a rebel—no rules here).
Approximate Information for One Serving
Nutrition Disclaimers
Number of total servings shown is approximate. Actual number of servings will depend on your preferred portion sizes.
Nutritional values shown are general guidelines and reflect information for 1 serving using the ingredients listed, not including any optional ingredients. Actual macros may vary slightly depending on specific brands and types of ingredients used.
To determine the weight of one serving, prepare the recipe as instructed. Weigh the finished recipe, then divide the weight of the finished recipe (not including the weight of the container the food is in) by the desired number of servings. Result will be the weight of one serving.
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