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When I make Brownies ’n Cream Sandwich Cookies, I rely on a boxed brownie mix for efficiency, combining it with egg, water, and oil to achieve the right dough consistency. Baking at 375°F for just minutes ensures each round stays soft. Once cooled, I assemble with vanilla frosting between pairs. Proper assembly and storage are essential for texture and flavor. If you want to master this process, you’ll need to know exactly what goes in and how it’s done.

Ingredients
- 1 box (19 7/8 ounces) Duncan Hines Dark Chocolate Fudge Brownie Mix
- 1 large egg
- 2 tablespoons water
- 1/3 cup vegetable oil
- 1 tub (16 ounces) Duncan Hines Creamy Home Style Classic Vanilla Frosting
Let’s talk about these ingredients for a second. First off, the boxed brownie mix—no shame in that shortcut, right? If anyone tells you otherwise, just remember: life is short, and so am I on patience. Grab the Duncan Hines if you can; if not, any dark chocolate fudge variety will do the trick, though fudginess is non-negotiable if you want that chewy, brownie-like cookie. The egg, water, and oil—classic trio, hard to mess up unless you forget one entirely, which, ahem, has happened to more people than will ever admit it. And don’t even think about skipping the store-bought frosting. Homemade frosting sounds noble, but some days just call for the ready-made, creamy, straight-from-the-tub kind. Besides, who has time to whip up buttercream after washing all those mixing bowls? You can always jazz up the filling with a sprinkle of cocoa powder or a dash of espresso powder if you’re feeling extra, but honestly, this combo is dangerously reliable as is.
Steps
- Preheat your oven to 375°F. Yes, you want it hot and ready, not “just thinking about warming up.” Consider setting up a premium home bar set nearby to keep drinks handy while you bake.
- Grease a cookie sheet. Old-school butter, nonstick spray, or—hey, why not—a bit of that leftover holiday cooking spray.
- Grab a big bowl. Dump in the entire 19 7/8 ounces of Duncan Hines Dark Chocolate Fudge Brownie Mix. Don’t skimp.
- Crack in 1 large egg. Try not to let the shell join the party.
- Add 2 tablespoons water. Not a splash more, not a splash less.
- Pour in 1/3 cup vegetable oil. Not olive oil unless you want cookies that taste like salad dressing.
- Stir it all up with a sturdy spoon until it’s a thick, glossy, slightly sticky dough. Think: “Can I sculpt a small mountain with this?”
- Scoop out dough by the level tablespoon, plop them 2 inches apart on your greased sheet, and marvel at your geometry skills.
- Bake at 375°F for 7–8 minutes. Set a timer. These cookies are drama queens—overbake and you’ll get hockey pucks.
- Let them chill on the pan for 1 minute. Not 59 seconds, not 2 minutes. Just enough to firm up, not enough to glue themselves to the pan.
- Use a spatula (or two if you’re nervous) to transfer cookies to a cooling rack. Channel your inner baking show contestant.
- Wait until cookies are completely cool. I know, patience is a virtue and all that, but warm cookies will melt the frosting into a slip-and-slide.
- Take half your cookies and slather the flat side with Duncan Hines Creamy Home Style Classic Vanilla Frosting—about 16 ounces in the tub, but let your sweet tooth be your guide.
- Top each frosted cookie with an unfrosted one. Press gently. You want a sandwich, not a pancake.
- Admire your stack of sandwich cookies, then immediately question whether to share.
- Optional: Lick leftover frosting from the tub. It’s called quality control.
- Store any extras in an airtight container, unless you have teenagers, in which case—good luck.
- If you’re baking near a stovetop or campfire, consider using a Premium Dutch Oven for other recipes that require steady, even heat.
Cooking Tips
While these cookies seem straightforward, attention to detail makes a big difference in texture and flavor. I always measure the brownie mix precisely for consistent results in brownies ‘n cream sandwich cookies. Don’t overmix the dough—stir just until combined. For even baking, drop uniform portions and space them evenly. Remove promptly at set time; overbaking dries them out. Cool completely before adding the cream filling.

Final Thoughts
What sets these brownies ‘n cream sandwich cookies apart is the precise ratio of ingredients and the attention to each step in the process. I measure each component carefully, ensuring the dough’s consistency is just right. Timing the bake prevents overcooking, resulting in a tender cookie. Cooling completely before assembly guarantees the frosting remains stable. These steps yield a consistently delicious, structurally sound sandwich cookie every time.