01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a large bowl, cream butter and sugar until light and fluffy using electric mixer.
03 - Beat in eggs one at a time, mixing well after each addition. Add vanilla extract and lemon zest.
04 - In separate bowl, whisk together flour, baking powder, and salt.
05 - Gradually add dry ingredients to wet mixture, alternating with milk, until soft dough forms.
06 - Roll dough into 1 tablespoon balls. Place on prepared sheets 2 inches apart. Bake 15-18 minutes until set and lightly golden on bottom.
07 - Cool completely. Scoop small cavity from flat side of each cookie using small knife, reserving crumbs.
08 - Melt chocolate with heavy cream until smooth. Stir in reserved crumbs and jam to form thick paste.
09 - Fill cavity of one cookie with chocolate mixture. Sandwich with another cookie, pressing gently to form peach shape.
10 - Mix water with drops of red and yellow food coloring. Lightly brush each cookie to blend colors, mimicking real peaches.
11 - Roll colored cookies in granulated sugar until evenly coated.
12 - Insert mint leaf into top of each cookie for realistic appearance, if desired.