Bump up the oven temperature to 375 and allow it to rise to the accurate temperature to bake the base. The dough for the base should only take 10 minutes to come all together.
In a separate bowl, you’re gonna want to mix your flour, baking soda, and ginger powder whisk it all together, and then set it aside.
In another mixing bowl, you’re going to mix the butter and sugar. It is light and air and fluffy and lighter by a couple of shades, then you’re going to add flour to your butter and I like to toss it around with either a fork or spatula. Either inside the bowl, or on a clean bench space, use your hands to kneading with medium-hard pressure until you get a solid, compact ball of dough, 3-4 minutes.
Line your loaf tin with parchment paper. Begin to break up the dough and sprinkle it over the bottom of the pan until it is evenly distributed. Then start to push down the dough - with either the back of the measuring cup, your hands, or with the back of the spoon.
Finish off by smoothing the base with the back of the spoon (or measuring cup), firmly pushing down on the edges of the base as the sides tend to rise more as the base bakes.
Next, you will dock the base. To to do this, we’re going to use a fork and poke horizontal lines along the base. This is gonna help allow the base to cook evenly by letting heat penetrate through the different holes made by the fork.
Place the base of the oven that is at 375°F for 22 to 25 minutes until the top is golden brown and the sides are slightly pulling away from the edge of the pan. Use the back of the spoon used earlier to push any raised sides of your base.