Millionaire Banoffee Traybake

16-20 bars

Frances Quinn's signature creation from Biscuits and Traybakes Week that proved style and substance could coexist. This inventive fusion of millionaire's shortbread and banoffee pie features a sandy, melt-in-your-mouth rice flour shortbread base, banana-infused caramel cooked to proper fudge consistency, and a glossy dark chocolate topping finished with flaky sea salt. Mary Berry was impressed that the toffee set despite the banana addition, while Paul Hollywood praised the biscuit flavor and the essential salt element. Cut into precise blocks and stack Jenga-style for Frances's signature playful presentation.

Chef's Notes: Addressing Judge Feedback

Mary Berry on Setting: "I was really worried about the toffee bit not setting because you'd put in banana and you've been able to cut through it so obviously."

The key to achieving properly set banana caramel is extended cooking time. Bananas contain significant moisture that must be evaporated, or the caramel will remain soft and oozy. Cook the caramel to 240–245°F (soft ball stage) — this typically takes 20–25 minutes of continuous stirring. The caramel should be thick enough to leave a clear trail when you drag a spatula through it.

Paul Hollywood on Flavor: "I think the flavor of the biscuit's good, chocolate on the top, and that little bit of salt in there as well."

Paul specifically praised the salted element. The flaky sea salt on the chocolate is essential — it cuts through the sweetness and brings all the flavors into focus. Use a quality flaky salt (Maldon is ideal) rather than fine salt, as the texture and irregular distribution create pleasant bursts of salinity.

Mary Berry on Balance: "This time not only have you got the design right, you've got the actual bake right too."

This was a pivotal moment for Frances — validation that creativity and technical precision could coexist. The lesson: never sacrifice technique for presentation. Each layer must be executed properly for the whole to succeed.

Troubleshooting Guide

Problem: Caramel won't set

Cause: Not cooked long enough; banana too wet

Solution: Cook to 240–245°F; use ripe but not overripe bananas

Problem: Caramel is grainy

Cause: Sugar crystallized; temperature shock

Solution: Ensure sugar fully dissolves before boiling; don't stir sides of pan

Problem: Caramel burned

Cause: Heat too high; stopped stirring

Solution: Use medium heat; stir continuously; use heavy pan

Problem: Shortbread is too hard

Cause: Overbaked; too much flour

Solution: Bake until just golden; measure flour by weight

Problem: Shortbread is crumbly

Cause: Not pressed firmly enough

Solution: Press very firmly; chill before baking

Problem: Chocolate cracked when cut

Cause: Too cold; cut too quickly

Solution: Let sit 10 min at room temp; use hot knife

Problem: Chocolate bloomed (white streaks)

Cause: Temperature fluctuation

Solution: Store at consistent cool temperature

Problem: Bars won't stack

Cause: Uneven cutting; layers too thick

Solution: Use ruler for precision; maintain even layer thickness

Problem: Banana flavor too strong

Cause: Overripe bananas; too much banana

Solution: Use just-ripe bananas; reduce to 1½ bananas

Storage and Make-Ahead Tips

Short-Term Storage: Store in an airtight container in the refrigerator for up to 1 week. The caramel firms up when cold, so let bars sit at room temperature for 10 minutes before serving for the best texture.

Freezing: Freeze uncut slab wrapped tightly in plastic wrap and foil for up to 2 months. Thaw overnight in the refrigerator before cutting.

Make-Ahead Strategy: The shortbread base can be baked up to 3 days ahead and stored airtight at room temperature. Add caramel and chocolate on the day of serving for best results, or assemble completely up to 3 days ahead.

Serving Temperature: These are best served at cool room temperature — cold enough that the layers hold their shape, but not so cold that the chocolate is hard and the caramel is overly firm.

Variations

Classic Millionaire's Shortbread: Omit the banana for traditional millionaire's shortbread. Reduce caramel cooking time to 15–18 minutes.

Salted Caramel Version: Increase salt in the caramel to ½ teaspoon and use milk chocolate instead of dark for a sweeter, saltier profile.

Peanut Butter Banoffee: Swirl 3 tablespoons of smooth peanut butter into the caramel just before pouring. Top with chopped roasted peanuts.

White Chocolate Topping: Replace dark chocolate with white chocolate for a sweeter, creamier finish. Add freeze-dried banana powder for extra banana punch.

Coffee Banoffee: Add 2 teaspoons of instant espresso powder to the caramel for a mocha-banana flavor combination.

Gluten-Free Version: Replace all-purpose flour with a 1:1 gluten-free flour blend. Keep the rice flour as is.

Frances's Presentation Tips

Frances was known for her creative presentations. To recreate her Jenga-style display:

1. Cut bars to identical dimensions (approximately 3 x 1.5 inches)

2. Stack in alternating directions like Jenga blocks

3. Add small squares of edible gold leaf to random bars

4. Place dried banana chips at artistic angles

5. Dust the serving plate with cocoa powder or gold luster dust