Preheat oven to 325 degrees.
Butter a 9” x 13” glass baking dish. Please note: if you are using a dark metal pan, bake the cake at 325-degree F. If you are using a light metal cake pan, then the cake may be baked at 350-degrees F. (I used a glass baking dish.)
In a large bowl stir together the flour, salt, sugar, baking powder, and pumpkin pie spice. Set aside.
In a medium bowl whisk the eggs. Add milk, pumpkin, and vanilla and whisk together.
Once combined well, slowly stir in the 1/2 cup melted butter. Mix until smooth. Set aside.
To make the topping: In a medium bowl, mix together the butter, pumpkin, brown sugar, flour, and pumpkin spice. Stir in the pecans. Set aside.
For the cake: Add the liquid ingredients from steps 3 and 4 to the flour mixture from step 2. Stir together just until ingredients are well combined. The batter is rather stiff.
Pour batter into the prepared baking dish. Spread evenly.
Drop the prepared topping evenly over cake batter by tablespoonsful. They will be fairly close together. Using a knife, marble/swirl the topping through the cake. See “Notes” at bottom of page.
Bake at 325 degrees for 30-40 minutes or until toothpick comes out nearly clean from center. You want to make sure that the cake is done, but don’t over-cook it. In my oven, the cake took about 35-37 minutes.
Remove cake from oven and set aside to cool for a few minutes while you assemble the glaze.
Place powdered sugar, milk, maple syrup, and vanilla in a large bowl. Whisk until smooth. Drizzle over warm cake.
Allow the cake to cool before cutting. Serve warm or at room temperature.