Directions
<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>To prepare the house-cultured butter (begin 24 hours ahead): In a clean glass jar, combine the heavy cream and yogurt. Stir well, cover with a clean cloth secured with a rubber band, and let sit at room temperature (about 20-22°C) for 18-24 hours until noticeably thickened and tangy. The natural bacteria from the yogurt will culture the cream, developing complex flavors that make your shortbread exceptional.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>Pour the cultured cream into a stand mixer and beat on medium-high speed until the fat solids separate from the buttermilk, about 5-7 minutes. The mixture will first become whipped cream, then suddenly break and separate – this is exactly what you want!</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Pour off the buttermilk (save it for pancakes or biscuits) and place the butter solids in a fine-mesh strainer. Rinse under cold water, kneading gently with a wooden spoon until the water runs clear. This removes residual buttermilk which could cause the butter to spoil quickly.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>Transfer the butter to a clean bowl, add salt if using, and work it in with a spatula. Press the butter into a container, cover, and refrigerate until firm, at least 2 hours. The cultured butter will have a wonderful tangy complexity that regular butter lacks.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>For the shortbread, preheat your oven to 150°C. Line a baking sheet with parchment paper. In a food processor or large bowl, combine the heritage grain flours, sugar, and salt, pulsing or whisking to mix thoroughly.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>Add the cold cubed cultured butter and vanilla extract. Pulse in the food processor or use your fingertips to work the butter into the flour mixture until it resembles coarse meal with some pea-sized pieces of butter remaining. Heritage grains have less gluten than modern wheat, so you can work this dough a bit more without toughening it – but still avoid overworking.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>Turn the mixture onto a clean surface and gently press together until it forms a cohesive dough. The warmth of your hands will help the butter bind with the flour. If the dough seems too dry, add 1-2 teaspoons of cold water; if too sticky, add a small amount of flour.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Roll the dough to about 1cm thickness. The varying protein levels in heritage grains create a beautiful complexity of flavor but also mean the dough might feel different from what you're used to – embrace this rustic quality! Cut into desired shapes using cookie cutters or a knife.</li><li class="MethodStepper"><h4 class="step-title">Step 9</h4>Transfer cookies to the prepared baking sheet, spacing them about 2cm apart. Prick each cookie several times with a fork – this isn't just decorative but prevents air bubbles from forming. Sprinkle lightly with additional sugar if desired.</li><li class="MethodStepper"><h4 class="step-title">Step 10</h4>Chill the shaped cookies in the refrigerator for 15 minutes before baking. This helps them maintain their shape and creates that perfect sandy shortbread texture.</li><li class="MethodStepper"><h4 class="step-title">Step 11</h4>Bake for 20-25 minutes until the edges are just beginning to turn golden. Heritage grains brown more quickly than refined flour, so watch carefully – you want a pale golden color, not dark brown. The cookies will still be somewhat soft when hot.</li><li class="MethodStepper"><h4 class="step-title">Step 12</h4>Allow cookies to cool on the baking sheet for 5 minutes (they're quite delicate when hot), then transfer to a wire rack to cool completely. As they cool, they'll develop that characteristic crisp-tender shortbread texture. Store in an airtight container for up to one week, though the complex butter flavors are most pronounced in the first few days.</li></ol>