Step 1: Preheat oven to 350°F (175°C). Line baking sheets with parchment paper. In a large bowl, cream together the softened butter and granulated sugar until light and fluffy. Beat in the egg yolk, vanilla powder, and finely crushed culinary lavender until well combined.
Step 2: In a separate small bowl, whisk together the all-purpose flour and salt. Gradually add the dry ingredients to the wet ingredients, mixing on low speed until a soft dough forms. Do not overmix. Wrap the dough in plastic wrap and chill in the refrigerator for at least 30 minutes.
Step 3: Once chilled, roll the dough into 1-inch balls and place them about 2 inches apart on the prepared baking sheets. Using your thumb or the back of a measuring spoon, make a deep indentation in the center of each cookie ball. Fill each indentation with about ½ teaspoon of apricot preserves.
Step 4: Bake for 12-15 minutes, or until the edges are lightly golden. The preserves will be bubbly.
Step 5: Remove cookies from the oven and let them cool on the baking sheets for 5 minutes before transferring them to a wire rack to cool completely.
Notes
Store cooled cookies in an airtight container at room temperature for up to 3-4 days, or refrigerate for longer enjoyment, up to a week.
To gently warm and re-soften the preserves while releasing the aromatic lavender, briefly heat cookies in a low oven (250°F/120°C) for 5 minutes, or microwave for 10-15 seconds.
These elegant cookies are a perfect pairing for your afternoon tea or coffee, and truly delightful when served as a light dessert alongside a scoop of vanilla bean ice cream.
For the most vibrant lavender flavor without any grittiness, ensure your culinary lavender is very finely crushed; you can even grind it with a tablespoon of the granulated sugar to ensure even distribution and a superior aroma.