01 -
Heat oven to 350°F (180°C). Line a 9-inch pan with parchment, then butter the sides.
02 -
Combine butter, brown sugar, corn syrup, and salt in a pot until melted. Stir in pecans until coated. Let it cool.
03 -
In a bowl, mix together flour, baking soda, and baking powder.
04 -
Using a mixer, beat softened butter, brown and granulated sugar, and vanilla for a couple of minutes. Add eggs one by one.
05 -
Slowly mix the dry ingredients and buttermilk into the butter mix, alternating until just blended.
06 -
Pour the chilled pecan topping into the prepared pan, then carefully spread the cake batter over it.
07 -
Put it in the oven for 35-40 minutes at 350°F, checking with a toothpick for doneness.
08 -
Let the finished cake cool at room temperature. Run a knife along the sides and flip it onto a serving plate.