These Grapefruit Vanilla Sablé Cookies are delicate, buttery French-style cookies infused with fresh grapefruit zest and smooth vanilla. With their tender melt-in-your-mouth texture and lightly sweet citrus aroma, these elegant slice-and-bake cookies are perfect for tea parties, holidays, or sophisticated dessert platters. The subtle grapefruit flavor pairs beautifully with rich butter and vanilla, creating a…