Try this Thumbprint Cookies with Icing Recipe.
Visual cues dictate doneness in shortbread-style doughs rather than internal temperatures or probes. Softened butter creamed with granulated sugar creates a dense crumb that holds impressions without fracturing. When shaping the rounds, press gently with a rounded thumb to form a depression deep enough to anchor the fruit without piercing the bottom.
Bake the ungreased sheet at 375 degrees Fahrenheit for precisely 15 minutes. Watch the edges closely. The baseline indicator for removal is a faint golden rim along the perimeter. The center should remain pale and matte. Let the batch rest undisturbed on the hot metal surface for 15 minutes to allow the interior structure to firm up completely before transferring them.
Combine powdered sugar with milk and vanilla until a viscous glaze forms. Transfer the mixture to a plastic bag, snip a tiny corner, and pipe perpendicular lines across the cooled surface. Pair these sweet pastries with unsweetened black coffee or robust hot tea to balance the high sugar concentration.