Stir the caramel across the entire base of the saucepan; condensed milk scorches in unattended corners.
Shortbread squares capped with stirred condensed-milk caramel and roasted peanut crunch.
The recipe card lists measured ingredients, numbered steps, storage guidance, and a nutrition estimate when available. Total time includes the listed preparation, rest, baking, and cooling periods for this recipe.
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Peanut Caramel Shortbread Crunch Bars Recipe
Follow the tray sizes, portions and baking intervals in the instructions below.
Total time includes hands-on preparation, required chilling or resting, whole-batch cooking, cooling and finishing.
Kitchen tools you’ll need
- 8-inch square metal pan
- parchment
- heavy saucepan
- silicone spatula
- bowl
- knife
- rack
Ingredients
US measures are approximate. Gram weights help keep portions consistent; spice weights vary with density.
Instructions
Mix the base
- Mix the base: Stir base butter and sugar smooth, then add base flour and salt until a firm dough gathers. Set aside topping ingredients; chopped peanuts should be in coarse halves, not meal.
Press the base
- Press the base: Line one 8-inch square metal pan with parchment overhang. Press all dough level and dock lightly. No chilling is needed.
Bake the base and cook caramel
- Bake the base and cook caramel: Heat oven to 325°F (165°C) conventional or 300°F (150°C) fan. Bake base 25–30 minutes until dry and pale gold. In a heavy saucepan combine caramel butter, brown sugar, condensed milk and golden syrup. Bring to a gentle boil over medium-low heat, stirring continuously across the pan corners, then simmer 6–8 minutes until thick and a spoon track briefly holds. Fold in peanuts and spread over the warm base. Caramel cooking is included in hands-on time, not oven baking.
Cool and set
- Cool and set: Cool 60 minutes in the pan on a rack, then refrigerate 60 minutes until caramel is firm enough to cut. Lift and cut 16 squares. Cooling/setting is 120 minutes, includes pan rest, and assumes caramel has already been spread.
Timing and scaling
- Timing and scaling: 35 min hands-on + 0 min required chill/rest + 30 min whole-batch oven baking + 120 min cooling/setting = 185 min. Cooling includes tray/pan rests and runs from the final tray; earlier-tray cooling may overlap later baking. Ingredient warm-up and frozen-dough thawing are extra; preheat during shaping/chilling. Scale ingredients and US equivalents, not oven temperature, piece sizes or per-tray bake time; extra trays extend the whole-batch time.
Chef’s Science & Pro Tips
Ingredient science
Cooking condensed milk with sugar and butter concentrates a firm topping; peanuts create a crunchy cap without a millionaire-style chocolate layer.
Technique & texture
Stir the caramel across the entire base of the saucepan; condensed milk scorches in unattended corners.
Finishing & serving
Let chilled squares stand covered for 15 minutes before serving so the caramel is chewy rather than hard; this optional serving time is extra.
Storage and make-ahead
| Method | How long | What to do |
|---|---|---|
| Room temperature | 2 days | Up to 2 days. Seal fully cooled filled bars airtight in a cool dry room. Separate layers with parchment; the filling gradually softens the crumb. |
| Refrigeration | up to 7 days | Unnecessary; up to 7 days if needed. Baked refrigeration is unnecessary for this formula; use only if the room is warm. Seal airtight to prevent condensation and odors. |
| Raw freezing | 1 month | Up to 1 month. Freeze the unfilled dough tightly wrapped. Thaw overnight in the refrigerator, then shape and complete the stated chill. Prepare the filling fresh. Thawing time is additional. |
| Baked freezing | 2 months | Up to 2 months. Freeze completely cooled bars airtight with parchment between layers. Thaw sealed at room temperature for 1–2 hours. |
| Restoring | As described | Serve after thawing. Do not oven-refresh the assembled or coated bars. Serve once thawed; reseal unused portions. |
Notes
- Scale ingredients, including US measures, without changing cookie size or oven temperature. Extra trays increase whole-batch time.
Nutrition
Approximate values per portion from the listed ingredient weights divided into 16 equal portions. Includes required fillings and finishes. Brands, unused coatings and actual portion size affect the estimate.
Frequently Asked Questions
What makes the caramel firm?
Cooking condensed milk with sugar and butter concentrates a firm topping; peanuts create a crunchy cap without a millionaire-style chocolate layer.
How do I avoid scorched caramel?
Stir the caramel across the entire base of the saucepan; condensed milk scorches in unattended corners.
Why is cold caramel hard to bite?
Let chilled squares stand covered for 15 minutes before serving so the caramel is chewy rather than hard; this optional serving time is extra.
Browse more cookie ideas in the Christmas Shortbread Cookies collection.
