Slow Cooker Gingerbread Molasses Bars

Name: Slow Cooker Gingerbread Molasses Bars
Prep time: 15 min
Cook time: 3 h
Total time: 3 h 15 min
Yield: 12 servings
Cuisine: American
Ingredients: ½ cup (113 g) unsalted butter, softened, softened to room temperature; ¾ cup (165 g) packed dark brown sugar; ½ cup (120 ml) unsulfured molasses; 1 large egg, at room temperature; 1 tsp (5 ml) vanilla extract; 1¾ cups (220 g) all-purpose flour; 1 tsp (5 g) baking powder; ½ tsp (2 g) baking soda; 1½ tsp (3 g) ground ginger; 1 tsp (2 g) ground cinnamon; ¼ tsp (½ g) ground cloves; ¼ tsp (1½ g) fine sea salt

From the MyKitchenBank Kitchen

Tender, deeply spiced gingerbread bars made in a slow cooker, delivering warm notes of molasses, ginger, cinnamon, and cloves. The slow, moist heat creates a fudgy crumb that's perfect for fall gatherings. These require no oven and yield a generous pan of bars with minimal active effort.

Prep: 15 min
Cook: 3 hr
Wait: 40 min
Total: 3 hr 55 min
Makes: 12 bars (from a 6-quart slow cooker)

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Steps

Before you start

Line your slow cooker insert with parchment paper (see tip for why)
Gather all dry spices—they'll be mixed ahead
Plan for 3 hours on low; the recipe is flexible if you need to cook 15–30 minutes longer

1
Prepare slow cooker
- Line the interior of a 6-quart slow cooker with parchment paper, letting it hang over two opposite sides (you'll use these as handles to lift the finished bars out).
- Set the slow cooker to its LOW setting and let it warm for 2 minutes.
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Tip: Parchment paper prevents sticking and lets you remove the entire cake in one piece for clean cutting.
2
Cream butter and sugar
- In a medium bowl, whisk together the softened unsalted butter and dark brown sugar until light and fluffy, about 2 minutes.
- Stir in the molasses, egg, and vanilla extract until fully combined.
- The mixture should be smooth and well-blended.
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Ready when: Mixture is smooth, uniform in color, and egg is fully incorporated.
Tip: Starting with softened butter ensures you don't overwork the batter; a quick 1–2 minutes is enough.
3
Mix dry ingredients
- In a small bowl, whisk together the all-purpose flour, baking powder, baking soda, ground ginger, ground cinnamon, ground cloves, and fine sea salt.
- Stir until the spices and leavening agents are evenly distributed throughout the flour.
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Ready when: Dry mixture is uniform in color with no streaks of flour or spice.
Tip: Whisking the dry ingredients prevents clumps of baking soda or baking powder from creating bitter spots.
4
Combine wet and dry
- Fold the dry mixture into the wet mixture using a wooden spoon, stirring until just combined.
- Overmixing will toughen the bars; stop as soon as no flour streaks are visible.
- The batter will be thick and substantial.
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Ready when: No visible flour streaks remain; batter is uniform and thick.
Tip: Do not overmix—a few gentle folds are all you need. Overmixing develops gluten and makes bars dense.
5
Transfer to slow cooker
- Scrape the entire batter into the parchment-lined slow cooker.
- Use a spatula to spread it into an even layer, pressing gently to fill any gaps.
- The batter should reach a depth of about 1.5 inches (4 cm).
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Ready when: Batter is evenly distributed and fills the bottom of the slow cooker.
Tip: Spread the batter as evenly as possible to ensure even cooking throughout.
6
Cook on low
- Cover the slow cooker with its lid and cook on LOW for 3 hours.
- The bars should be set on top but still moist and tender in the center.
- A toothpick inserted 1 inch (2.5 cm) from the edge should come out clean or with just a few moist crumbs; the very center may be slightly underbaked.
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Ready when: Top is set and lightly browned; edges pull slightly from the sides; toothpick inserted 1 inch from edge comes out clean.
Tip: Slow cookers vary widely in temperature; if your bars still look wet on top after 3 hours, cover and cook another 15–20 minutes, then check again.
7
Cool in place
- Turn off the slow cooker and leave the lid off.
- Allow the bars to cool in the slow cooker for 20–30 minutes.
- They will firm up slightly as they cool and will be easier to handle.
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Ready when: Bars are warm to the touch but no longer very hot.
Tip: This cooling period prevents the bars from breaking when you lift them out.
8
Remove and cut
- Using the parchment paper handles, lift the entire cake out of the slow cooker and place it on a cutting board.
- Once it has cooled to room temperature (about 10 minutes more), use a sharp knife to cut it into 12 bars (4 cuts one direction, 2 cuts the other).
- Wipe the blade clean between cuts for neat edges.
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Ready when: Bars are at room temperature and hold their shape when cut.
Tip: A serrated bread knife or even a hot, damp knife works better than a regular knife for clean cuts without crumbling.

Good to know

Tips

Slow cookers create a naturally moist bake because of the enclosed, steamy environment—this is why these bars stay tender for days.
If you're unsure about your slow cooker's temperature accuracy, start checking for doneness at the 2.5-hour mark.
These bars pair beautifully with whipped cream, cream cheese frosting, or a drizzle of glaze made from powdered sugar and milk.
For extra spice depth, toast the ginger, cinnamon, and cloves in a dry skillet over low heat for 1 minute before adding to the flour—this blooms their flavor.

Make ahead

Up to 3 days ahead: prepare the batter, cover, and refrigerate. Add 15–20 extra minutes to the slow cooker cooking time if baking from cold. Or bake the bars 1 day ahead, wrap, and store at room temperature.

Storage & reheating

Room temperature: up to 3 days in an airtight container. Refrigerator: up to 5 days (rewarm gently in a low oven if desired). Freezer: up to 2 months wrapped individually in plastic wrap. Thaw at room temperature for 1–2 hours or rewarm in a 300°F oven for 10 minutes.

Substitutions

unsulfured molasses → honey or dark corn syrup. The bars will be slightly less deep in flavor and a touch less moist, but the texture and spice profile remain pleasant.
packed dark brown sugar → light brown sugar. Use the same amount; the bars will be slightly milder in molasses flavor but still delicious.
ground ginger → 1 tablespoon (9 g) fresh ginger, minced and added to the wet ingredients. Fresh ginger will give a brighter, peppery bite. Reduce ground ginger to 0.5 teaspoon if using fresh.
all-purpose flour → whole wheat flour or all-purpose flour blend. The bars may be slightly denser and nuttier. Mix whole wheat and all-purpose 1:1 for the best balance.