Red Currant Bakery

Apple Filling
0 Rinse the apples and cut into 1″ chunks.
2 Add the apples, lemon juice, sugar, cinnamon and salt into a medium pot.
3 Cook over medium low heat, stirring occasionally until the apples start to break down. You want about half the apples to start to fall apart and the other half to still be in chunks just soft.
4 Once cooked, remove the pot from the heat and set aside to cool to room temperature.
Streusel
6 In a medium bowl add in the soft butter, brown sugar, cinnamon, salt, and vanilla. Use a fork to stir together until smooth.
7 Pour in the flour and use the fork to rub the flour into the butter mixture until fully combined.
Cake Batter
9 Preheat the oven to 350 F and place a rack in the center.
10 In a medium bowl add in the butter, both sugars, salt, and vanilla. Beat with an electric mixer until smooth.
11 Add in one egg at a time, mixing in between each egg until smooth.
12 Add in the flour, baking soda, and baking powder. Mix until just combined.
13 Grate the apple right on top of the cake batter. Then squeeze on a tablespoon of lemon juice. Use a flat rubber spatula to fold the apple and lemon into the cake batter - don't stir because it'll get tough. Just fold until combined.
14 If not using a non-stick pan, spray the metal pan with your baking spray and line with a rectangle of parchment that is 15" x 8" from one side to another.
Assemble & Bake
16 Pour the cake batter into the lined pan and use a rubber spatula to smooth it into a flat, even layer.
19 Carefully spoon the cooked and cooled apples on top of the cake layer. Do your best not to mix it with the cake batter.
20 Crumble the streusel over the cooked apple layer.
21 Place the cake into the preheated oven and bake for 30 minutes. Rotate the cake 180 degrees and bake for 15-20 more minutes.
22 The cake will be done when the streusel will be slightly more golden brown in some spots and the cake should only have a very slight or no wobble.
23 Once baked, remove from the oven and leave to cool for 5 minutes while you make the glaze.
Glaze
25 In a medium bowl add in the powdered sugar, melted butter, and maple syrup.
26 Whisk to combine until smooth. Add more maple syrup as needed to create a thin syrupy texture.
27 While the cake is still warm, pour the glaze on top and use the back of a spoon to spread it over the streusel.
28 Immediately sprinkle with flaky sea salt.
30 Leave the cake to cool for at least 30 minutes on a wire rack. Ideally you want the glaze to set until the glaze is hard and crackly. Think glazed donut.
29 Run a knife along the edge between the cake and the pan. Then either lift the cake out with the parchment or slice the cake while it's still in the pan.