Moist Pumpkin Bars Recipe Made with Cake Mix

Two-ingredient pumpkin bars made with cake mix are one of the simplest and most satisfying fall desserts you can bake. This inexpensive, quick recipe pairs a box of cake mix with pumpkin puree for moist, tender bars. Top them with cream cheese frosting, powdered sugar glaze, or enjoy them plain. You can also fold in white chocolate chips or chopped nuts for extra texture and flavor.

Close-up of a hand holding pumpkin bars made with cake mix, and more cake pieces in the background.

This version of easy pumpkin bars is a variation on simple two-ingredient pumpkin muffins: only a cake mix and canned pumpkin are required to bake this dessert. Occasionally I add extras to the batter, but the basic combination with frosting is a fast crowd-pleaser during the holidays.

Cake Mix Pumpkin Bars

Cake mix is a versatile pantry staple for more than birthday cakes and cupcakes — try it as the base for quick pumpkin bars. A spice cake mix works best because it already contains warm autumn spices, but you can use yellow or white cake mix and add pumpkin pie spice, cinnamon and a pinch of nutmeg to taste. Below are notes on frosting, pan size, and how to avoid overbaking so your bars stay moist.

Cake Mix Pumpkin Bars

Pumpkin Bars with Cream Cheese Frosting

Cream cheese frosting is a classic topping for pumpkin bars. Use a ready-made tub or make a quick frosting by beating cream cheese with a little powdered sugar, vanilla, and a pinch of pumpkin pie spice or cinnamon for extra warmth. Fold in a spoonful of whipped topping for a lighter, fluffier texture, if desired. Spread the frosting only after the bars have cooled completely to prevent it from sliding off.

Ingredient Notes

For this easy recipe you need:

  • 1 box spice cake mix (or yellow/white cake mix plus added spices)
  • 1 can (15 oz) pumpkin puree — not pumpkin pie filling
  • Optional: 1 tub cream cheese frosting or your preferred topping

Is pumpkin pie mix the same as pumpkin puree?

No. Pumpkin puree is simply cooked, mashed pumpkin. Pumpkin pie mix contains spices and sweeteners and is designed specifically for pies. Use plain pumpkin puree for these bars so you control the spice level.

What size pan should you use?

I bake these in a 9×13-inch pan for moderate thickness. An 8×8-inch pan will yield thicker bars and will require a slightly longer bake time (about 25 minutes). Check for doneness with a toothpick; the bars should be moist but set.

A mixing bowl filled with pumpkin cake bars batter sits on a gray surface, surrounded by canned pumpkin and a cake mix box, ready to whip up delicious pumpkin bars with cake mix. Nearby, whipped topping waits to add the finishing touch.

If you have a can of pumpkin that needs using, this is a great way to put it to good use. The main risk is overbaking — start checking at 20 minutes. Insert a toothpick near the center: if it comes out with moist crumbs attached, the bars are done. Let them cool completely in the pan before adding frosting; warm bars will make the topping run.

Libby’s Pumpkin Bars Recipe (Easy)

Preheat the oven to 350°F (175°C). In a large bowl, stir together the cake mix and pumpkin puree until smooth. Pour and spread the batter into a prepared 9×13-inch baking pan (lined with parchment paper or sprayed with nonstick spray).

How long to bake

Bake for about 20–22 minutes in a 9×13 pan, or until a toothpick inserted in the center comes out mostly clean with moist crumbs attached. For an 8×8 pan, bake about 25 minutes. Avoid baking longer than necessary to keep the bars tender.

While the bars cool, beat together 1 tub of cream cheese frosting with 1/2 teaspoon pumpkin pie spice or cinnamon until light and airy. Spread over completely cooled bars, then slice into squares and serve.

Libby's Pumpkin Bars Recipe

No-Frosting Option and Add-Ins

If you prefer no frosting, stir in white chocolate chips or chopped walnuts before baking for a sweet or crunchy element. These additions keep the bars interesting without a topping. Store leftovers properly to maintain moisture.

Pumpkin Bars with Cake Mix — Recipe Details

Author: Justine

Prep: 10 mins | Cook: 20 mins | Servings: 24

Equipment

  • 9×13-inch baking pan (or 8×8 for thicker bars)
  • Mixing bowl

Ingredients

  • 1 box cake mix (spice type recommended)
  • 1 can (15 oz) pumpkin puree
  • 1 tub cream cheese frosting (optional)

Instructions

  1. Preheat oven to 350°F (175°C). In a large bowl, combine the cake mix and pumpkin puree until smooth.
  2. Spread the batter evenly in a prepared 9×13 pan (or 8×8 for thicker bars).
  3. Bake 20–22 minutes (9×13) or about 25 minutes (8×8), until a toothpick comes out with moist crumbs attached.
  4. Cool completely. Beat frosting with 1/2 teaspoon pumpkin pie spice or cinnamon, if desired, then spread over cooled bars.
  5. Slice into squares and enjoy.

Tips

  • Use spice cake mix for built-in autumn flavor; add 1–2 teaspoons pumpkin pie spice if using yellow or white mix.
  • Do not overbake — start checking at 20 minutes to keep bars moist.
  • Store unfrosted bars wrapped at room temperature for up to 3 days; frosted bars should be refrigerated.

Nutrition (approximate per serving)

Serving size: 1 oz — Calories: 79 kcal; Carbohydrates: 18 g; Protein: 1 g; Fat: 1 g; Sugar: 9 g; Sodium: 157 mg.

Frequently Asked Questions

How long can pumpkin bars be left out?

Plain pumpkin bars can be wrapped and left at room temperature for up to 3 days. Bars with cream cheese frosting should be refrigerated in an airtight container.

Should I refrigerate pumpkin bars?

If they are frosted, yes. Plain bars can be stored at room temperature for a short time, but refrigeration will keep them fresher longer.

A frosted square pumpkin bars with cake mix, is lifted on a spatula above more slices on parchment paper.