Position a rack in the upper third of the oven and heat the oven to 375°F.
Toast the pine nuts on a rimmed baking sheet, stirring occasionally, until fragrant and golden, about 5 minutes. Transfer to a small bowl to cool.
In a medium bowl, stir the flour, sugar, zest, baking powder, salt, cinnamon, and pine nuts. In a small bowl, whisk the oil and egg and add to the dry ingredients. Mix with your hands until the dough is evenly moist and holds together when squeezed, 1 to 2 minutes.
Fill a small bowl with about 1/4 cup sugar. Pinch off 1 rounded teaspoonful of dough (about 1/2 oz.). Shape it into a ball, coat it in the sugar, and set it in on a light-colored nonstick cookie sheet. Dip the bottom of a drinking glass in the sugar and flatten the cookie to slightly less than 1/4 inch thick. Repeat to make 13 more cookies.
Bake until the tops are golden and the edges are brown, 9 to 13 minutes. Let the cookies cool on the sheet for several minutes, then transfer them to a rack to cool completely. While the first batch of cookies bakes, shape the remaining dough into cookies and arrange on a second cookie sheet. When the first batch is done, bake the second batch.
The cookies will keep in an air-tight container at room temperature for up to 3 days.
nutrition information (per serving):
Photo: John Kernick