Preheat your oven to 350°F and line an 8x8-inch baking dish with parchment paper for easy removal.
In a large mixing bowl, combine the full can of pumpkin puree, almond flour, one egg, pumpkin pie spice, and sea salt, whisking until the batter is smooth.
In a separate medium bowl, whisk together the Greek yogurt, vanilla protein powder, the second egg, maple syrup, and vanilla extract until creamy.
Pour the spiced pumpkin mixture into the prepared baking dish and spread it into an even layer using a spatula.
Dollop the yogurt protein mixture over the pumpkin base and use a butter knife to gently swirl the two batters together to create a marbled pattern.
Bake for 35 to 40 minutes or until the edges are firm and the center has a slight, stable jiggle.
Let the bars cool completely in the pan before slicing into two large portions to enjoy as a high-protein meal.