Step 1

Adjust oven rack to middle position and heat oven to 350 degrees. Grease 9-inch springform pan. Whisk flour, baking powder, and salt together in bowl.

Step 2

Using stand mixer fitted with whisk attachment, whip eggs on medium speed until foamy, about 1 minute. Add 1¼ cups sugar and lemon zest, increase speed to high, and whip until mixture is fluffy and pale yellow, about 3 minutes. Reduce speed to medium and, with mixer running, slowly pour in oil. Mix until oil is fully incorporated, about 1 minute. Add half of flour mixture and mix on low speed until incorporated, about 1 minute, scraping down bowl as needed. Add milk and mix until combined, about 30 seconds. Add remaining flour mixture and mix until just incorporated, about 1 minute, scraping down bowl as needed.

Step 3

Transfer batter to prepared pan; sprinkle remaining 2 tablespoons sugar over entire surface. Bake until cake is deep golden brown and toothpick inserted in center comes out with few crumbs attached, 40 to 45 minutes. Transfer pan to wire rack and let cool for 15 minutes. Remove side of pan and let cake cool completely, about 1 1/2 hours. Cut into wedges and serve.