01 -
Preheat oven to 350°F. Lightly grease an 8-inch square baking pan.
02 -
Whisk together flour, baking powder, baking soda, salt, and pumpkin pie spice in a medium bowl until evenly mixed.
03 -
In a large bowl, beat softened butter with brown sugar until light and fluffy, about 2 to 3 minutes.
04 -
Add eggs one at a time to the creamed mixture, blending well after each addition. Stir in pumpkin purée, Greek yogurt, and vanilla extract until smooth.
05 -
Gradually fold dry ingredients into wet mixture just until combined to avoid over-mixing.
06 -
Pour batter into prepared pan, smoothing top. Bake for 28 to 32 minutes until toothpick inserted in the center comes out clean or with a few moist crumbs. Let cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
07 -
Whisk powdered sugar, milk, and vanilla extract in a small bowl until smooth and pourable. Adjust consistency by adding more milk if necessary.
08 -
Once cake is completely cooled, drizzle glaze over the top and allow to set for 10 minutes before slicing. Serve slightly warm or at room temperature.