Start by adjusting your oven rack to the middle position and preheating to 350°F. Spray a 9-inch springform pan with non-stick cooking spray (the kind with flour in it works beautifully for this). The springform pan is key because it lets you remove the sides without flipping or inverting, which keeps your presentation pristine.

While your oven heats, combine the sugar, flour, and melted butter in a small bowl. Using a fork, mix these together until the texture looks like wet sand with some small clumps forming. You want some texture here—this isn't supposed to be fully combined. Set this aside while you work on the batter. The topping will seem like nothing right now, but trust me, it transforms into something magical.

In another small bowl, whisk together your flour, baking powder, and salt. This distributes the leavening agent evenly so your cake rises uniformly. Don't skip this step—it might seem small, but it makes a real difference in texture.

In a large mixing bowl, beat the softened butter and sugar together using an electric mixer on medium speed for about 2-3 minutes. You're looking for a light, fluffy mixture that's noticeably paler than when you started. This creaming process incorporates air, which helps your cake rise and creates that tender crumb we're after.

Add your eggs one at a time, beating well after each addition. Then add the vanilla extract, milk, and lemon zest. Mix until everything is well combined and you don't see any streaks of white. The zest is important—don't skip it or use bottled lemon juice here. Fresh zest gives you those little bursts of bright flavor that make this cake special.

Add your flour mixture to the wet ingredients and mix on low speed just until combined. This is important: overmixing develops too much gluten, which makes cake tough and dense. You want to mix just until you don't see dry flour anymore. Stir in that ginger I mentioned—it adds a subtle warmth that deepens the lemon flavor without being obvious.

Gently fold in the blueberries using a spatula. If you're using frozen berries, use them straight from the freezer—don't thaw them. The cold berries stay more intact during baking, which keeps them from turning the entire cake blue. If using fresh, that works beautifully too.

Spread the batter evenly into your prepared springform pan, smoothing the top with a spatula. Now sprinkle that crumb topping over everything in an even layer. Don't press it down—just let it sit on top. This is where the magic happens.

Bake at 350°F for 45-55 minutes. The cake is done when the top is golden brown and a toothpick inserted into the center comes out clean or with just a few moist crumbs. You can also use an instant-read thermometer—the center should reach 210°F. Every oven is different, so start checking around the 45-minute mark. You want the edges set but the center still slightly moist to keep things tender.

While the cake cools, whisk together your powdered sugar and lemon juice. Start with 1 tablespoon of juice and add more until you reach a drizzly consistency—thin enough to flow but thick enough to cling to the cake.

Let the cake cool in the pan for 10 minutes. Run a thin knife around the edge and remove the springform ring. Drizzle your glaze over the warm or cooled cake in whatever pattern feels right to you. Cool completely before serving for cleaner slices, though I completely understand if you can't wait and eat it warm anyway.