Preheat your oven to 350°F (175°C) and grease your 9x13-inch dish. This is the step where my little Olivia always races to the oven like it’s her big moment.
In a large bowl, whisk together the [flour], [salt], [sugar], and [baking powder]. My daughter loves “cloud testing” the flour to see how fluffy it feels.
In another bowl, whisk the [milk], [eggs], [vanilla], and [melted butter] until smooth. Olivia always sneaks a vanilla sniff here and smiles every time.
Pour wet into dry and gently stir. Not too much, just until smooth. Overmixing makes tough cake, and tough cake never survives snack time.
Pour half the batter into your dish. Olivia always tries to smooth it like icing , she takes this job very seriously.
Mix the [butter], [brown sugar], [flour], and [cinnamon] into a thick swirl paste. This is where the kitchen officially smells like happiness.
Drop spoonfuls over the batter, add remaining batter on top, and swirl gently. Olivia calls this “making tornado art.”
Bake 35–40 minutes until golden. The smell always brings my husband into the kitchen pretending he “just needed water.”
Whisk the [powdered sugar], [milk], and [vanilla] until silky smooth.
Pour glaze over the warm cake and watch it melt into every swirl. Olivia always says, “Mom… this should be illegal it’s so good.”