Vintage Sour Cream Raisin Bars with Oat Crumble Tips, FAQ & printable recipe

Tips for success

For an extra layer of flavor, consider adding a pinch of ground cinnamon or nutmeg to the oat mixture. These spices pair exceptionally well with raisins, enhancing the vintage appeal of the bars.

Ensure you toast the oats lightly in a dry pan beforehand if you prefer a deeper, nuttier flavor profile in your crust, though this is entirely optional and adds a nice dimension to the final result.

When slicing the cooled bars, use a sharp, thin-bladed knife and wipe it clean with a damp cloth between each cut. This technique ensures that the layers remain distinct and the custard does not smear across the top of the oat crumble. If you find the bars are particularly firm, you can run the knife under warm water and dry it quickly before making each cut for even smoother results.

Variations

• Nutty Raisin Bars: Add one half cup of chopped walnuts or pecans to the oat mixture for a satisfying crunch and nutty flavor that complements the raisins perfectly.
• Cinnamon Spiced Bars: Stir one teaspoon of ground cinnamon and a quarter teaspoon of ground cloves into the custard filling to provide a warm, aromatic spice profile.

Storage and make-ahead

Fridge

Keep refrigerated in an airtight container for up to 5 days.

Freezer

Wrap individual bars tightly in plastic wrap and store in a freezer-safe bag for up to 3 months.

Reheat

Thaw overnight in the refrigerator and bring to room temperature before serving, or warm slightly in a low oven if preferred.

Store the bars in an airtight container at room temperature for up to two days, or in the refrigerator for up to five days. To maintain the crispness of the oat topping, place a sheet of parchment paper between layers if stacking them. Keeping them in a cool, dry place away from direct sunlight will help preserve their texture and prevent the custard from becoming too soft over time.

These bars are an excellent candidate for making ahead, as they often taste even better after the flavors have had time to meld in the refrigerator.

You can prepare the entire dish a day in advance, allow it to cool completely, and then store it covered in the fridge until ready to serve. If you prefer them at room temperature, simply remove the desired amount from the fridge about thirty minutes before serving.

Serving ideas

Serve these bars on a decorative platter for a classic dessert presentation. They pair beautifully with a cup of hot coffee or black tea, which helps balance the richness of the custard.

Because they are quite substantial, smaller squares are often sufficient, though they are always popular enough that guests might reach for a second piece. Consider serving them alongside fresh berries if you want to add a bright, acidic note to the plate.

If serving for a special occasion, you can lightly dust the tops with a small amount of confectioners' sugar just before bringing them to the table. This adds a touch of elegance and highlights the texture of the oat crumble.

Ensure the bars are served at room temperature to allow the full flavor of the custard to shine through, as cold temperatures can sometimes mute the subtle sweetness of the raisins.

Frequently asked questions

Recipe card

Vintage Sour Cream Raisin Bars with Oat Crumble

Prep 20 minCook 40 minRest 30 minTotal 1 h 30 minServes 12

Ingredients

• 4 cups oat crumbs
• 2 cups sour cream
• 1 cup raisins

Instructions

1. Take the oat crumbs and pour them into the bottom of the large white rectangular ceramic baking dish. Use your hand to press the crumbs firmly into the bottom and corners to create a compact, even crust layer.
2. In a plain white bowl, combine the thick pale sour cream with the dark raisins. Pour this custard mixture over the prepared oat crust, spreading it out to ensure it covers the base completely.
3. Crumble the remaining oat crumbs over the top of the sour cream raisin custard. Place in a preheated oven at 350°F (175°C) and bake until the top is golden and the edges are bubbling. Remove from the oven and let cool completely before lifting a square with a spatula.

Contains: gluten, milk

Food safety: The custard is served soft; use pasteurised eggs if serving pregnant women, young children, older adults, or anyone with a weakened immune system.

Estimated nutrition per serving

Calories

280

Protein

4 g

Carbohydrates

38 g

Fat

13 g

Fiber

2 g

Sugar

18 g

Sodium

95 mg

Automatic estimate from the ingredient list, not laboratory-verified.