Lemon Sunshine Shortbread Squares

Plus: Sauternes, Midwest Recipe Box Mysteries, Next Week's Mushroom Soup

A mysterious lemon squares recipe from our Midwest family box gets a modern refresh. Enhanced with fresh techniques and paired with noble-rot affected Sauternes, this bright dessert shows how heritage recipes can evolve while maintaining their soul. As winter citrus reaches its peak, it's the perfect time to share this golden combination.

In my treasured Midwest recipe box, among carefully preserved family recipes, this one remains a mystery. The penciled script, elegant but unidentifiable, offers a recipe for classic lemon bars with just enough detail for someone who already knew their way around a kitchen.

My mom and I share an inherited craving for bright flavors - lemon meringue pie, lime sorbet, anything that makes your mouth pucker just a bit before the sweetness follows. This citrus craving runs deep across generations – all my grandmas and great-grandmas made lemon squares, and the whole family shares this love for tart-sweet citrus. While I may never know which matriarch penned this particular recipe, I know it’s part of a long tradition of citrus-loving bakers in our family, seamlessly connecting past and present.

My first attempt following the penciled card revealed a classic formula - a buttery shortbread base topped with lemon filling - but the results weren’t quite there. Playing with technique led to delicious discoveries: poking holes in the warm shortbread creates pathways for the lemon curd to meld with the base, while processing fresh zest with sugar creates a fragrant, yellow-tinted mixture that intensifies the citrus flavor throughout. A slight reduction in sugar allows more natural citrus brightness to come through - just enough to make your cheeks pucker.

These thoughtful adjustments honor my family’s citrus-loving heritage while elevating the recipe to new heights. Each change – the fork-pricked base, lemony sugar, and balanced sweetness – adds sophistication but retains traditional comfort. In this way, reimagining the familiar with fresh eyes brings delightful kitchen magic.

Lemon Sunshine Shortbread Squares

Total time: 45 minutes + 3 hours cooling/chilling | Serves: 16

Temp: 350ºF/177ºC

Equipment

• 8x8” baking pan

• Parchment paper

• Measuring spoons/scales

• Food processor

• Mixing bowl and spoon

• Microplane

• Whisk

• Cooling rack

• Sharp knife

Ingredients

Shortbread

• 150g (1¼ cup) flour

• 40g (⅓ cup) confectioners’ sugar plus more for topping

• 1g (¼ tsp) salt

• 85g (6 tbsp) cold butter, cut into small pieces

Lemon Curd

• 300g (1½ cups) sugar

• 9g (1½ tbsp) zest of 3 lemons

• 30g (¼ cup) flour

• 4 eggs (200g), room temperature

• 120ml (½ cup) lemon juice (about 3 lemons)

Instructions

Base

1. Preheat oven to 350°F. Line 8x8” pan with parchment paper

2. In a food processor, combine flour, sugar, and salt.

3. Add cold butter and pulse until the mixture resembles coarse sand.

4. Press the mixture evenly into the prepared pan

5. Bake for 20 minutes until a light golden color.

6. Remove from oven and poke holes all over the warm crust with a fork (not all the way through)

Topping

1. While the shortbread bakes, add sugar to the food processor. Using a microplane, zest the lemons directly over the sugar; pulse until well incorporated and the sugar is light yellow.

2. In a large bowl, add lemon sugar to the flour and whisk together

3. Crack eggs in a separate bowl to check for shells, then whisk.

4. Measure 120ml of lemon juice, then pour it and the eggs into the flour-sugar mixture and whisk until well combined.

5. Pour the filling over warm shortbread, then return to the oven for 20 minutes, until the edges are firm and the center jiggles slightly.

6. Cool completely (about 1 hour), then chill in the refrigerator for 2 hours.

7. When ready to serve, remove from the pan, dust with powdered sugar, then cut into bars using a clean, sharp, damp knife.

Note:

To make ahead, cut the squares, then freeze them on a baking tray. Wrap individually and store in the freezer for up to 3 months. Dust with powdered sugar before serving.

Lemon Sunshine Shortbread Squares

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This elevated version of our heritage lemon squares, with its balanced sweetness and bright citrus notes, calls for an equally sophisticated partner. Sauternes answers perfectly, its notes of honey, apricot, and orange blossom mirroring and enhancing our dessert’s complexity. From the Graves region of Bordeaux, these noble-rot-affected wines develop a unique concentration of flavors that beautifully complement our citrus-forward creation. Made primarily from Sémillon and Sauvignon Blanc grapes, Sauternes offers the perfect balance of sweetness and acidity, keeping each bite fresh and vibrant.

While the legendary Château d’Yquem stands at the pinnacle of Sauternes production, excellent values can be found from other producers in the region. The wine’s complexity comes from botrytis cinerea (noble rot), which naturally concentrates the grapes in this unique microclimate, creating wines with remarkable depth that pair brilliantly with citrus-based desserts.

Classic Sauternes Pairings

• Château Suduiraut ($35/375ml): Honeyed citrus, apricot notes

• Château Coutet Barsac ($35/375ml): Fresh, vibrant style

• Château Rieussec ($40/375ml): Classic expression

Value Alternative

• Moulin Jamet Sancerre ($20/750ml): Bright citrus, great value, widely available at Trader Joe’s

Other Options

• Late Harvest Riesling: Bright, pure fruit

• Moscato d’Asti: Light, fresh alternative

• Prosecco: Celebrates citrus notes

• Non-alcoholic: Meyer lemon sparkling water with honey drizzle - echoes both the sweetness and brightness of Sauternes.

Serving Notes

• Temperature: 50-54°F

• Glass: Small dessert wine glass

• Pour: 2-3 oz serving

Mushroom Soup

A luxurious winter soup discovered in our Midwest family recipe box transforms mushrooms, onions, and stock into pure comfort with the magic of butter and cream. Each spoonful tells the story of how farmhouse cooking elevated simple ingredients into something silky and special.